Locking os and xcode version for github action

Author: ssathy2

.github/workflows/ios.yml

@@ -9,7 +9,9 @@ on:
 jobs:
   build:
     name: Build and Test SDKHostApp scheme using any available iPhone simulator
-    runs-on: macos-latest
+    runs-on: macos-11
+    env:
+        DEVELOPER_DIR: /Applications/Xcode_13.app/Contents/Developer
 
     steps:
       - name: Checkout