Generate the injector on CI

Author: kraenhansen

.github/workflows/check.yml

@@ -50,4 +50,5 @@ jobs:
       - run: npm run build
       - run: npm run copy-node-api-headers --workspace react-native-node-api-modules
       - run: npm run build-weak-node-api --workspace react-native-node-api-modules
+      - run: npm run generate-weak-node-api-injector --workspace react-native-node-api-modules
       - run: npm test --workspace react-native-node-addon-examples