Pin markdown-link-check to v3.11.0 on GitHub Actions

[PeterDaveHello]

Description

Pin markdown-link-check to v3.11.0 in the GitHub Actions workflow to avoid incorrect 404 errors on existing section links.

Motivation and Context

Starting from markdown-link-check v3.12.1, there is a bug where it incorrectly reports 404 errors for valid existing section links in Markdown files, while v3.11.2 and older do not have this issue, as seen in the CI log:

https://github.com/nodejs/docker-node/actions/runs/8650084895/job/23717794438?pr=2066

To ensure our CI continues to function correctly without these false positive 404 errors, this PR pins the markdown-link-check version to v3.11.0 in the GitHub Actions workflow file.

Testing Details

The changes in this PR were tested by running the updated GitHub Actions workflow on a test branch. The previously occurring false positive 404 errors no longer appear after pinning markdown-link-check to v3.11.0.

Types of changes

• Documentation
• Version change (Update, remove or add more Node.js versions)
• Variant change (Update, remove or add more variants, or versions of variants)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Other (none of the above)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING.md document.
• All new and existing tests passed.