Create compiled-languages-swift.md

Author: felickz

troubleshooting/codeql-builds/compiled-languages-swift.md

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+# Unable to automatically build your code - XCode version issue
+
+The GitHub runners for macos will have a default version of xcode in use. See ["included software"](https://github.com/actions/runner-images/tree/main?tab=readme-ov-file#available-images) for the appropriate macos label.  
+
+To use any other version that is installed, you can run this command to explicitly set an Xcode version
+
+```yml
+ - name: Select Xcode version 
+   run: sudo xcode-select -s '/Applications/Xcode_15.3.app/Contents/Developer'
+```
+
+
+Sample output:
+```
+Command line invocation:
+  [2024-04-25 18:01:23] [build-stdout]     /Applications/Xcode_15.3.app/Contents/Developer/usr/bin/xcodebuild build -project /Users/runner/work/felickz-advanced-security-mobile-ios-test/felickz-advanced-security-mobile-ios-test/iGoat-Swift/iGoat-Swift.xcodeproj -target iGoat-Swift CODE_SIGNING_REQUIRED=NO CODE_SIGNING_ALLOWED=NO
+```
+
+
+Alternatively, use a GitHub action to set this: https://github.com/marketplace/actions/setup-xcode-version