fix(ci): Use correct metadata-action syntax for tag extraction

Author: cz3k

.github/workflows/ci.yaml

@@ -39,7 +39,7 @@ jobs:
       with:
         images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
         tags: |
-          type=raw,value={{tag}},enable=${{ startsWith(github.ref, 'refs/tags/') }}
+          type=ref,event=tag
           type=raw,value=latest,enable=${{ startsWith(github.ref, 'refs/tags/') }}
 
     - name: Build and push Docker image