fix docker container name

Author: Matthijz98

.github/workflows/ci.yml

@@ -44,7 +44,7 @@ jobs:
         with:
           context: .
           push: true
-          tags: ghcr.io/${{ github.repository }}:latest
+          tags: ghcr.io/${{ toLower(github.repository) }}:latest
 
       - name: Deploy via SSH
         uses: appleboy/ssh-action@v0.1.10