update action mac version

Author: TomTasche

.github/workflows/ios_main.yml

@@ -4,18 +4,14 @@ on: [push]
 jobs:
   test:
     name: test
-    runs-on: macos-latest
+    runs-on: macos-11
     steps:
       - name: checkout
         uses: actions/checkout@v2
         with:
           token: ${{ secrets.PAT_TOMTASCHE }}
           submodules: true
 
-      - uses: futureware-tech/simulator-action@v1
-        with:
-          os_version: ">=14.5"
-
       - name: pods
         run: pod install