chore(teslamate): Switch Teslamate image source to Docker Hub

The `teslamate` service in `docker-compose.yml` has been updated to pull its image from `teslamate/teslamate:latest` on Docker Hub. This change simplifies the image reference and ensures consistency with the primary distribution channel.

teslamate/docker-compose.yml

@@ -1,6 +1,6 @@
 services:
   teslamate:
-    image: ghcr.io/teslamate/teslamate:latest
+    image: teslamate/teslamate:latest
     restart: always
     environment:
       - ENCRYPTION_KEY=/run/secrets/password