revert: keep macOS runners as macos-latest

- Revert macOS runners back to macos-latest from macos-13
- The main fix is ENABLE_USER_SCRIPT_SANDBOXING = NO, not the macOS version
- Keep using latest macOS runners for best compatibility

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: ened

.github/workflows/examples.yml

@@ -27,7 +27,7 @@ jobs:
           cd example && flutter build apk --debug
 
   example_ios:
-    runs-on: macos-13
+    runs-on: macos-latest
     steps:
       - uses: actions/checkout@v4
       - uses: subosito/flutter-action@v2

.github/workflows/test.yml

@@ -22,7 +22,7 @@ jobs:
           flutter test
 
   native_ios_tests:
-    runs-on: macos-13
+    runs-on: macos-latest
     steps:
       - uses: actions/checkout@v4
       - uses: subosito/flutter-action@v2
@@ -68,7 +68,7 @@ jobs:
         device:
           - "iPhone 16 Pro"
       fail-fast: false
-    runs-on: macos-13
+    runs-on: macos-latest
     steps:
       - uses: actions/checkout@v4
       - uses: subosito/flutter-action@v2