Update build.yml

Author: KarimEbrahemAbdelaziz

.github/workflows/build.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: macos-latest
     strategy:
         matrix: 
-          destination: ['platform:iOS Simulator,OS:13.5,name:iPhone 11 Pro Max']
+          destination: ['platform=iOS Simulator,OS=13.5,name=iPhone 11 Pro Max']
     steps:
       - name: Checkout
         uses: actions/checkout@master