fix the following markdownlint issues (#2362)

fix the following markdownlint errors (and some more):

[..]mixins/node-exporter/README.md:13: MD031 Fenced code blocks should be surrounded by blank lines
[..]mixins/node-exporter/README.md:21: MD031 Fenced code blocks should be surrounded by blank lines
[..]mixins/node-exporter/README.md:27: MD031 Fenced code blocks should be surrounded by blank lines
[..]mixins/node-exporter/README.md:33: MD031 Fenced code blocks should be surrounded by blank lines
[..]mixins/node-exporter/README.md:41: MD034 Bare URL used
A detailed description of the rules is available at https://github.com/markdownlint/markdownlint/blob/master/docs/RULES.md

Signed-off-by: Sven Kieske <s.kieske@mittwald.de>
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Sven Kieske 2022-06-28 05:50:06 +02:00 committed by GitHub
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@ -10,33 +10,36 @@ for Grafana.
To use them, you need to have `jsonnet` (v0.16+) and `jb` installed. If you
have a working Go development environment, it's easiest to run the following:
```bash
$ go install github.com/google/go-jsonnet/cmd/jsonnet@latest
$ go install github.com/google/go-jsonnet/cmd/jsonnetfmt@latest
$ go install github.com/jsonnet-bundler/jsonnet-bundler/cmd/jb@latest
go install github.com/google/go-jsonnet/cmd/jsonnet@latest
go install github.com/google/go-jsonnet/cmd/jsonnetfmt@latest
go install github.com/jsonnet-bundler/jsonnet-bundler/cmd/jb@latest
```
Next, install the dependencies by running the following command in this
directory:
```bash
$ jb install
jb install
```
You can then build the Prometheus rules files `node_alerts.yaml` and
`node_rules.yaml`:
```bash
$ make node_alerts.yaml node_rules.yaml
make node_alerts.yaml node_rules.yaml
```
You can also build a directory `dashboard_out` with the JSON dashboard files
for Grafana:
```bash
$ make dashboards_out
make dashboards_out
```
Note that some of the generated dashboards require recording rules specified in
the previously generated `node_rules.yaml`.
For more advanced uses of mixins, see
https://github.com/monitoring-mixins/docs.
<https://github.com/monitoring-mixins/docs>.