#419 Add GitHub Action to Check for Dead Links in Documentation

[Khushalsarode]

Contributor checklist

• This pull request is on a separate branch and not the main branch
• I have tested my code with the pytest command as directed in the testing section of the contributing guide

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Description

• Installs the necessary dependencies for Sphinx and link checking.

• Runs the Sphinx link check builder to identify broken links.

• The results are displayed, and if broken links are found, the action will fail.

• Add GitHub Action to Check for Dead Links in Documentation #419

[github-actions]

Thank you for the pull request!

The Scribe team will do our best to address your contribution as soon as we can. The following is a checklist for maintainers to make sure this process goes as well as possible. Feel free to address the points below yourself in further commits if you realize that actions are needed :)

If you're not already a member of our public Matrix community, please consider joining! We'd suggest using Element as your Matrix client, and definitely join the General and Data rooms once you're in. Also consider joining our bi-weekly Saturday dev syncs. It'd be great to have you!

Maintainer checklist

• The linting and formatting workflow within the PR checks do not indicate new errors in the files changed

• The CHANGELOG has been updated with a description of the changes for the upcoming release and the corresponding issue (if necessary)