Updated macos runner

Author: nikarh

.github/workflows/build.yml

@@ -34,7 +34,7 @@ jobs:
         name: vitasdk-linux
         path: build/*.tar.bz2
   build-macos:
-    runs-on: macos-10.15
+    runs-on: macos-12
     steps:
     - uses: actions/checkout@v3
     - uses: actions/setup-python@v2