bump markdown-checker to 1.3.1

[john0isaac]

Hey 👋🏼,
Thank you for using the tool.
I recently used zizmor to audit the package and fixed all the issues it flagged.

This update includes:

• Sticky comments, only one comment will be posted per command used instead of spamming the pull request with every push.
• zizmor security fixes.
• Only posting comments to pull requests for push we update summary of job and mark it as failed/succeed.
• I pinned markdown-checker the python package behind this tool since I saw unpinned dependencies causing lots of issues everywhere.
• Due to pull_request: write GitHub restrictions it's no longer required since commenting won't work unless the pull request is not from a fork. only updating the summary and GitHub annotations.

For more info check: https://markdown-checker.readthedocs.io/en/latest/howto/github-actions/