Update build_test.yml

Author: JarvanMo

.github/workflows/build_test.yml

@@ -19,6 +19,7 @@ jobs:
         with:
           channel: stable
       - run: flutter pub get
+      - run: cd example/ios; pod update WechatOpenSDK-XCFramework; cd ../..
       - run: cd example; flutter build ios --no-codesign
 
   test_iOS_No_Pay: