fix: github action

.github/workflows/docker.yml

@@ -1,5 +1,5 @@
 # https://github.com/marketplace/actions/build-and-push-docker-images#git-context
-name: ci
+name: docker
 
 
 on:
@@ -37,7 +37,7 @@ jobs:
             type=semver,pattern={{version}}
             type=semver,pattern={{major}}.{{minor}}
       -
-        if: github.event.pull_request.head.repo.full_name == github.repository
+        if: ${{ github.repository == 'jsonnet-libs/docsonnet' }}
         name: Login to DockerHub
         uses: docker/login-action@v1 
         with: