📝 Update Frontend README.md (#1462)

Fix incorrect script name which was generate-frontend-client.sh and now is generate-client.sh

Author: getmarkus

frontend/README.md

@@ -80,7 +80,7 @@ But it would be only to clean them up, leaving them won't really have any effect
 * From the top level project directory, run the script:
 
 ```bash
-./scripts/generate-frontend-client.sh
+./scripts/generate-client.sh
 ```
 
 * Commit the changes.