protobuf 3.20.1

[beeradmoore]

• Have you followed the guidelines for contributing?
• Have you ensured that your commits follow the commit style guide?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing brew install --build-from-source <formula>)? If this is a new formula, does it pass brew audit --new <formula>?

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Brew audit says

> brew audit --strict --online protobuf                                     
protobuf:
  * HEAD: Use `branch: "main"` to specify the default branch
Error: 1 problem in 1 formula detected

[SMillerDev]

This is a duplicate of #99843 but since that is stalled let's see how far we get here

[beeradmoore]

Whops. Sorry for the duplicate.

TIL: PRs don't show up when you search a repo 😅

[SMillerDev]

You can search in PRs. But Homebrew is too big for normal search to work.

[chenrui333]

Close as duplicate. Thanks!