chore(ci): exec nitrogen before ios ci

Author: mfazekas

.github/workflows/ci.yml

@@ -160,6 +160,7 @@ jobs:
       - name: Install cocoapods
         if: env.turbo_cache_hit != 1 && steps.cocoapods-cache.outputs.cache-hit != 'true'
         run: |
+          yarn nitrogen
           cd example
           bundle install
           bundle exec pod install --project-directory=ios