test: add pod install to reduce build time

Author: juliansteenbakker

.github/workflows/code-integration.yml

@@ -91,6 +91,12 @@ jobs:
           os_version: ">=18.1"
           model: "iPhone 15"
       - run: flutter pub get
+      - name: Pod Install
+        working-directory: flutter_secure_storage/example
+        run: |
+          cd ios
+          pod install
+          cd ..
       - run: flutter build ios --simulator --target=integration_test/app_test.dart
         working-directory: flutter_secure_storage/example
       - run: flutter test integration_test