Updates configuration for markdownlint to disable MD031 rule for list items

Reference:

> Set the `list_items` parameter to `false` to disable this rule for list items. Disabling this behavior for lists can be useful if it is necessary to create a tight list containing a code fence.

https://github.com/DavidAnson/markdownlint/blob/main/doc/Rules.md#md031---fenced-code-blocks-should-be-surrounded-by-blank-lines
Signed-off-by: Frank Brückner <[email protected]>

Author: froschdesign

etc/markdownlint.json

@@ -4,5 +4,6 @@
     "MD014": false,
     "MD024": false,
     "MD028": false,
+    "MD031": { "list_items": false },
     "MD034": false
 }