[Chapel Merge] Update our copy of the released Homebrew formula

Branch: refs/heads/main
Revision: d0c557b53a01186fa955dd7ca35f58cc0727dd29
Author: chapel-lang
Link: Update our copy of the released Homebrew formula by github-actions[bot] · Pull Request #29271 · chapel-lang/chapel · GitHub
Log Message:
Update our copy of the released Homebrew formula (#29271)

Homebrew formula commit is 21a9dc9fd8b7db54f8935539fd078bc700cd74da and
file hash is
664da0f1f6961b74beaeb7c9b4db2b57642c4eea79d34d53d90afdbe5c03404a.
Created by GitHub Actions

Compare: Comparing c20e22f2ad8425cd238209ea5e0cc68a91c25e52...913a6a9a29f8e4c31ea2b44f8e70732dbbbd8d31 · chapel-lang/chapel · GitHub

Diff:
M util/packaging/homebrew/chapel-upstream-commit
M util/packaging/homebrew/chapel.rb
https://github.com/chapel-lang/chapel/pull/29271.diff