Update docker-push.yml

* add build_args

Author: s-shiryaev

.github/workflows/docker-push.yml

@@ -37,4 +37,7 @@ jobs:
         with:
           context: .
           push: true
+          build-args: |
+            UNIT_VERSION=${{ matrix.unit }}
+            PHP_VERSION=${{ matrix.php }}
           tags: ${{ secrets.DOCKERHUB_USERNAME }}/nginx-unit-php:${{ matrix.php }}-unit${{ matrix.unit }}