[CI] Change macos version to 11 from 10.5

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Odin check
         run: ./odin check examples/demo/demo.odin -vet
   build_macOS:
-    runs-on: macOS-latest
+    runs-on: macos-11
     steps:
       - name: Setup Xcode version
         uses: maxim-lobanov/[email protected]