Update Docker images in ghcr_cleanup workflow

Author: alexcos20

.github/workflows/ghcr_cleanup.yml

@@ -4,8 +4,8 @@ on:
   workflow_dispatch:
 
 env:
-  DOCKERHUB_IMAGE: ${{ 'oceanprotocol/ocean-node' }}
-  GHCR_IMAGE: ${{ 'ghcr.io/oceanprotocol/ocean-node' }}
+  DOCKERHUB_IMAGE: ${{ 'oceanprotocol/df-py' }}
+  GHCR_IMAGE: ${{ 'ghcr.io/oceanprotocol/df-py' }}
 
 jobs:
   ghcr_cleanup: