chore: Fix cron test workflow failing due to wrong reasons

Signed-off-by: Sebastian Malton <sebastian@malton.name>

.github/workflows/cron-test.yaml

@@ -50,5 +50,8 @@ jobs:
           retry_on: error
           command: npm ci
 
+      - name: Build library parts
+        run: run npm build -- --ignore open-lens
+
       - run: npm run test:unit
         name: Run tests