fix

docs/production_deploy.md

@@ -37,6 +37,10 @@ Install the Python dependency if required:
 python -m pip install boto3
 ```
 
+The PowerShell entry point calls `tool/upload_launcher_release.py` as a regular
+Python file. Keep this helper beside the deployment script; it performs the S3
+upload and verifies the uploaded object's byte length.
+
 Back up `.moonwell_signing\dsa_priv.pem` in the project secret store. Never
 commit it, upload it to Object Storage, or send it through chat. Losing this key
 prevents released launchers from accepting future updates.