Replacing 'HTTP' by 'HTTPS' for securing links (#5252)

Currently, when we access the modified pages with **HTTP**, it is
redirected to **HTTPS** automatically. So this commit aims to
replace **HTTP** to **HTTPs** for security.

Co-Authored-By: Nguyen Phuong An <AnNP@vn.fujitsu.com>
Signed-off-by: Kim Bao Long <longkb@vn.fujitsu.com>

docs/configuration/configuration.md

@@ -24,7 +24,7 @@ This will also reload any configured rule files.
 
 To specify which configuration file to load, use the `--config.file` flag.
 
-The file is written in [YAML format](http://en.wikipedia.org/wiki/YAML),
+The file is written in [YAML format](https://en.wikipedia.org/wiki/YAML),
 defined by the scheme described below.
 Brackets indicate that a parameter is optional. For non-list parameters the
 value is set to the specified default.
@@ -678,7 +678,7 @@ service account and place the credential file in one of the expected locations.
 ### `<kubernetes_sd_config>`
 
 Kubernetes SD configurations allow retrieving scrape targets from
-[Kubernetes'](http://kubernetes.io/) REST API and always staying synchronized with
+[Kubernetes'](https://kubernetes.io/) REST API and always staying synchronized with
 the cluster state.
 
 One of the following `role` types can be configured to discover targets:

docs/configuration/template_examples.md

@@ -9,7 +9,7 @@ Prometheus supports templating in the annotations and labels of alerts,
 as well as in served console pages. Templates have the ability to run
 queries against the local database, iterate over data, use conditionals,
 format data, etc. The Prometheus templating language is based on the [Go
-templating](http://golang.org/pkg/text/template/) system.
+templating](https://golang.org/pkg/text/template/) system.
 
 ## Simple alert field templates
 

docs/configuration/template_reference.md

@@ -9,7 +9,7 @@ Prometheus supports templating in the annotations and labels of alerts,
 as well as in served console pages. Templates have the ability to run
 queries against the local database, iterate over data, use conditionals,
 format data, etc. The Prometheus templating language is based on the [Go
-templating](http://golang.org/pkg/text/template/) system.
+templating](https://golang.org/pkg/text/template/) system.
 
 ## Data Structures
 
@@ -31,7 +31,7 @@ The metric name of the sample is encoded in a special `__name__` label in the `L
 ## Functions
 
 In addition to the [default
-functions](http://golang.org/pkg/text/template/#hdr-Functions) provided by Go
+functions](https://golang.org/pkg/text/template/#hdr-Functions) provided by Go
 templating, Prometheus provides functions for easier processing of query
 results in templates.
 
@@ -53,7 +53,7 @@ If functions are used in a pipeline, the pipeline value is passed as the last ar
 
 | Name          | Arguments     | Returns |  Notes    |
 | ------------- | --------------| --------| --------- |
-| humanize      | number        | string  | Converts a number to a more readable format, using [metric prefixes](http://en.wikipedia.org/wiki/Metric_prefix).
+| humanize      | number        | string  | Converts a number to a more readable format, using [metric prefixes](https://en.wikipedia.org/wiki/Metric_prefix).
 | humanize1024  | number        | string  | Like `humanize`, but uses 1024 as the base rather than 1000. |
 | humanizeDuration | number     | string  | Converts a duration in seconds to a more readable format. |
 | humanizeTimestamp | number    | string  | Converts a Unix timestamp in seconds to a more readable format. |
@@ -66,11 +66,11 @@ versions.
 
 | Name          | Arguments     | Returns |    Notes    |
 | ------------- | ------------- | ------- | ----------- |
-| title         | string        | string  | [strings.Title](http://golang.org/pkg/strings/#Title), capitalises first character of each word.|
-| toUpper       | string        | string  | [strings.ToUpper](http://golang.org/pkg/strings/#ToUpper), converts all characters to upper case.|
-| toLower       | string        | string  | [strings.ToLower](http://golang.org/pkg/strings/#ToLower), converts all characters to lower case.|
-| match         | pattern, text | boolean | [regexp.MatchString](http://golang.org/pkg/regexp/#MatchString) Tests for a unanchored regexp match. |
-| reReplaceAll  | pattern, replacement, text | string | [Regexp.ReplaceAllString](http://golang.org/pkg/regexp/#Regexp.ReplaceAllString) Regexp substitution, unanchored. |
+| title         | string        | string  | [strings.Title](https://golang.org/pkg/strings/#Title), capitalises first character of each word.|
+| toUpper       | string        | string  | [strings.ToUpper](https://golang.org/pkg/strings/#ToUpper), converts all characters to upper case.|
+| toLower       | string        | string  | [strings.ToLower](https://golang.org/pkg/strings/#ToLower), converts all characters to lower case.|
+| match         | pattern, text | boolean | [regexp.MatchString](https://golang.org/pkg/regexp/#MatchString) Tests for a unanchored regexp match. |
+| reReplaceAll  | pattern, replacement, text | string | [Regexp.ReplaceAllString](https://golang.org/pkg/regexp/#Regexp.ReplaceAllString) Regexp substitution, unanchored. |
 | graphLink  | expr | string | Returns path to graph view in the [expression browser](https://prometheus.io/docs/visualization/browser/) for the expression. |
 | tableLink  | expr | string | Returns path to tabular ("Console") view in the [expression browser](https://prometheus.io/docs/visualization/browser/) for the expression. |
 
@@ -98,7 +98,7 @@ Consoles are exposed on `/consoles/`, and sourced from the directory pointed to
 by the `-web.console.templates` flag.
 
 Console templates are rendered with
-[html/template](http://golang.org/pkg/html/template/), which provides
+[html/template](https://golang.org/pkg/html/template/), which provides
 auto-escaping. To bypass the auto-escaping use the `safe*` functions.,
 
 URL parameters are available as a map in `.Params`. To access multiple URL