Always run on the latest macOS runner

They get deprecated real fast, and since you can target a specific SDK
version the runner used shouldn't matter that much. Hopefully.

Author: robbert-vdh

.github/workflows/build.yml

@@ -22,9 +22,9 @@ jobs:
     strategy:
       matrix:
         include:
-          - { name: ubuntu-20.04,       os: ubuntu-20.04,   cross-target: '' }
-          - { name: macos-universal,    os: macos-12,       cross-target: aarch64-apple-darwin }
-          - { name: windows,            os: windows-latest, cross-target: '' }
+          - { name: ubuntu-20.04,       os: ubuntu-20.04,       cross-target: '' }
+          - { name: macos-universal,    os: macos-macos-latest, cross-target: aarch64-apple-darwin }
+          - { name: windows,            os: windows-latest,     cross-target: '' }
     name: Package plugin binaries
     runs-on: ${{ matrix.os }}
     steps: