GitHub Actions: Replace deprecated macos-12 with macos-13 (#2756)

Author: hugovk

.github/workflows/check.yml

@@ -42,10 +42,10 @@ jobs:
           - { os: macos-latest, py: "brew@3.8" }
           - { os: ubuntu-latest, py: "3.7" }
           - { os: windows-latest, py: "3.7" }
-          - { os: macos-12, py: "3.7" }
+          - { os: macos-13, py: "3.7" }
           - { os: ubuntu-latest, py: "pypy-3.7" }
           - { os: windows-latest, py: "pypy-3.7" }
-          - { os: macos-12, py: "pypy-3.7" }
+          - { os: macos-13, py: "pypy-3.7" }
         exclude:
           - { os: windows-latest, py: "pypy-3.10" }
           - { os: windows-latest, py: "pypy-3.9" }