Update update_ml_data.yml

Author: vazish

.github/workflows/update_ml_data.yml

@@ -36,6 +36,7 @@ jobs:
 
   download-ml-feature-data:
     runs-on: ubuntu-latest
+    needs: download-ml-perfherder-data
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3