Fix YAML syntax error in amplify.yml

- Remove colon from echo command that was causing YAML parsing error
- Commands should now execute properly

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

Co-Authored-By: Claude <noreply@anthropic.com>

amplify.yml

@@ -8,9 +8,9 @@ frontend:
       commands:
         - echo "Build started on `date`"
         - echo "Configuring environment variables..."
-        - echo "YOUTUBE_API_KEY value: ${YOUTUBE_API_KEY}"
+        - echo "YOUTUBE_API_KEY value is ${YOUTUBE_API_KEY}"
         - echo "YOUTUBE_API_KEY=${YOUTUBE_API_KEY}" > .env.production
-        - echo "Contents of .env.production:"
+        - echo "Contents of .env.production file"
         - cat .env.production
         - npm run build
   artifacts: