Upodated workflow

Author: N-Holzschuch

.github/workflows/build.yml

@@ -14,7 +14,7 @@ jobs:
     - uses: actions/checkout@v2
 
     - name: xcode-select
-      run: sudo xcode-select -s /Applications/Xcode_12.3.app
+      run: sudo xcode-select -s /Applications/Xcode.app
 
     - name: build-ios_system
       run: swift run --package-path xcfs build