Use XCode 16.4 to fix pod lint

Author: simolus3

.github/actions/xcframework/action.yml

@@ -24,7 +24,13 @@ runs:
     - name: Set up XCode
       uses: maxim-lobanov/setup-xcode@v1
       with:
-        xcode-version: latest-stable
+        # TODO: Update to latest-stable once GH installs iOS 26 simulators
+        xcode-version: '^16.4.0'
+    
+    - name: List simulators
+      shell: bash
+      run: |
+        xcrun xctrace list devices
 
     - name: Build iOS & macOS xcframework
       shell: bash