fix registry name

Author: pashagolub

.github/actions/build-docker/action.yml

@@ -73,7 +73,7 @@ runs:
       id: meta
       uses: docker/metadata-action@v5
       with:
-        images: ${{ inputs.registry }}/${{ inputs.image-name }}
+        images: ${{ inputs.registry == 'docker.io' && inputs.image-name || format('{0}/{1}', inputs.registry, inputs.image-name) }}
         tags: |
           # For releases: apply SemVer tags and latest (excludes pre-releases automatically)
           type=semver,pattern={{version}}