"macos-latest" is not the latest :(

https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners#supported-runners-and-hardware-resources

Author: jberkel

.github/workflows/build.yml

@@ -5,7 +5,7 @@ env:
   IOS_VERSION: 14.4
 jobs:
   build:
-    runs-on: macos-latest
+    runs-on: macos-11
     steps:
     - uses: actions/checkout@v2
     - name: Install