Merge pull request #1127 from kiwix/update-to-xcode-15.4

Update to Xcode 15.4 on CI

Author: kelson42

.github/actions/xcbuild/action.yml

@@ -53,10 +53,10 @@ runs:
           -T /usr/bin/security \
           -T /usr/bin/productbuild || true
 
-    - name: Set Xcode version (15.2.0)
+    - name: Set Xcode version (15.4.0)
       shell: bash
       # https://github.com/actions/runner-images/blob/main/images/macos/macos-13-Readme.md#xcode
-      run: sudo xcode-select -s /Applications/Xcode_15.2.0.app
+      run: sudo xcode-select -s /Applications/Xcode_15.4.0.app
 
     - name: Create Keychain
       shell: bash