rename the image to upc instead of upc-api

Author: SkyTheCodeMaster

.github/workflows/docker.yml

@@ -24,4 +24,4 @@ jobs:
         with:
           context: .
           push: true
-          tags: ghcr.io/${{ github.actor }}/${{ github.event.repository.name }}:latest
+          tags: ghcr.io/${{ github.actor }}/upc:latest