Fix CI: Use Xcode 15.2 (available on GitHub Actions)

Author: sdfsdhgjkbmnmxc

.github/workflows/tests.yml

@@ -14,7 +14,7 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Select Xcode
-      run: sudo xcode-select -s /Applications/Xcode_15.4.app
+      run: sudo xcode-select -s /Applications/Xcode_15.2.app
 
     - name: Swift version
       run: swift --version