style: autocorrect readthedocs and GitHub .git homepages

[dtrodrigues]

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same change?
• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes? Here's an example.
• Have you successfully run brew style with your changes locally?
• Have you successfully run brew tests with your changes locally?

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Read the Docs sites are hosted on .io and not .org: https://blog.readthedocs.com/securing-subdomains/
.git on GitHub refers to the git repository, not the homepage

We should flag (and possibly autocorrect) these homepage URLs during style checks.

[dtrodrigues]

Test failure is expected, will re-run CI after Homebrew/homebrew-core#59138 is merged into hombrew-core and then linuxbrew-core.