fix: remove table formatting from github gists (#416)

* fix: fix CSS issue with gist embeds

* Addressing PR comments

* remove newline

* simplify selector and add example

* fix spellcheck

* fix markdownlint

Co-authored-by: Robert Kaussow <mail@thegeeklab.de>

exampleSite/content/en/features/code-blocks.md

@@ -83,13 +83,25 @@ echo "Hello World"
 
 **Example:**
 
-<!-- markdownlint-disable -->
-
 <!-- prettier-ignore-start -->
+<!-- markdownlint-capture -->
+<!-- markdownlint-disable -->
 {{< highlight Shell "linenos=table" >}}
 # some code
 echo "Hello World"
 {{< /highlight >}}
+<!-- markdownlint-restore -->
 <!-- prettier-ignore-end-->
 
-<!-- markdownlint-enable -->
+## Gist Shortcode
+
+The Gist shortcode is a built-in Hugo shortcode to load GitHub gists. For details usage information please check the Hugo [documentation](https://gohugo.io/content-management/shortcodes/#gist).
+
+<!-- prettier-ignore -->
+```markdown
+{{</* gist spf13 7896402 */>}}
+```
+
+**Example:**
+
+{{< gist spf13 7896402 >}}