chore: bump macos runner version

GitHub Action is sunsetting the macOS 10.15 Actions runner. It will stop working intermittently until being completely removed by 2022-8-30: https://github.blog/changelog/2022-07-20-github-actions-the-macos-10-15-actions-runner-image-is-being-deprecated-and-will-be-removed-by-8-30-22

Author: renbaoshuo

.github/workflows/ci-actions.yml

@@ -82,7 +82,7 @@ jobs:
     name: Running on ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-10.15, windows-2019]
+        os: [macos-11, windows-2019]
     steps:
       - name: Checkout
         uses: actions/checkout@v3