ci: use Flutter 3.24.5 on macos-15 for Xcode 16 and Firebase 11 compatibility

.github/workflows/build-ios.yaml

@@ -13,7 +13,7 @@ on:
 jobs:
   build-ios:
     name: Build iOS IPA
-    runs-on: macos-14
+    runs-on: macos-15
     if: github.server_url == 'https://github.com'
 
     steps:
@@ -22,13 +22,13 @@ jobs:
 
       - name: Select Xcode Version
         run: |
-          sudo xcode-select -s /Applications/Xcode_15.4.app || sudo xcode-select -s /Applications/Xcode.app
+          sudo xcode-select -s /Applications/Xcode.app/Contents/Developer
           xcodebuild -version
 
       - name: Set up Flutter
         uses: subosito/flutter-action@v2
         with:
-          flutter-version: '3.19.3'
+          flutter-version: '3.24.5'
           cache: true
 
       - name: Inspect Environment