Fix generated documentation lint configuration

Nest the Markdown line-length setting under MD013 so Super-Linter applies the repository limit to generated help files.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: MariusStorhaug

.github/linters/.markdown-lint.yml

@@ -12,7 +12,7 @@ MD004: false # Unordered list style
 MD007:
   indent: 2 # Unordered list indentation
 MD013:
-line_length: 3000 # Line length
+  line_length: 3000 # Line length
 MD025: false # Allow front-matter title + visible H1 on docs pages
 MD026:
   punctuation: '.,;:!。，；:' # List of not allowed