raylib: update checksum

[SMillerDev]

• 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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See raysan5/raylib#2942 for verification.

[SMillerDev]

Confirmed upstream

[chenrui333]

Looks like build failed.

[ZhongRuoyu]

Changed build to build-static. It should work now.

[ZhongRuoyu]

The only failure is below, which is expected. Merging now.

==> brew audit raylib --online --git --skip-style
==> FAILED
Full audit raylib --online --git --skip-style output
  raylib:
    * stable sha256 changed without the url/version also changing; please create an issue upstream to rule out malicious circumstances and to find out why the file changed.
  Error: 1 problem in 1 formula detected

[BrewTestBot]

@ZhongRuoyu has triggered a merge.