[Fix] build: CI: GitHub: macOS: Do not upgrade Homebrew packages on m…

…acOS 12 because it is unsupported and upgrading causes all kinds of problems. Just install our dependencies. See r21789.

git-svn-id: https://source.openmpt.org/svn/openmpt/branches/OpenMPT-1.30@21791 56274372-70c3-4bfc-bfc3-4c3a0b034d27

.github/workflows/macOS-12-Makefile.yml

@@ -27,8 +27,6 @@ jobs:
       run: brew unlink node@18 && brew unlink node && brew link --overwrite node
     - name: fixup GitHub Homebrew python breakage
       run: brew unlink [email protected] && brew unlink [email protected] && brew link --overwrite [email protected] && brew link --overwrite [email protected]
-    - name: upgrade packages
-      run: brew upgrade
     - name: install dependencies
       run: brew install p7zip help2man doxygen autoconf-archive mpg123 libogg libvorbis portaudio flac libsndfile sdl2
     - name: setup parallel make