fix: Added missing registry username to the tag

.gitea/workflows/build-and-push.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Build and push containers
         run: |
           for dir in $(find . -type f -iname 'Dockerfile' -exec dirname {} \; | sed 's|^\./||'); do
-            tag="${{ secrets.CONTAINER_REGISTRY }}/$dir:latest"
+            tag="${{ secrets.CONTAINER_REGISTRY }}/${{ secrets.CONTAINER_REGISTRY_USERNAME }}/$dir:latest"
             docker build -t "$tag" "$dir"
             docker push "$tag"
           done