ci: Wrap Docker images name with quotes

Not sure if this is required, but my IDE was complaining about it.

.github/workflows/docker-image.yaml

@@ -58,7 +58,7 @@ jobs:
         id: meta
         uses: docker/metadata-action@v5
         with:
-          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          images: "${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}"
           tags: |
             type=semver,pattern={{version}}
             type=semver,pattern={{major}}.{{minor}}