fix labels

[xquery]

various labels are not getting set properly on release images

[xquery]

https://github.com/curl/curl-docker/pull/68/files

[xquery]

current labels are

 "Labels": {
               "docker.cmd": "podman run -it quay.io/curl/:8.7.1",
               "io.buildah.version": "1.23.1",
               "maintainer": "James Fuller <jim.fuller@webcomposite.com>",
               "name": "curl-linux-amd64:8.7.1",
               "org.opencontainers.image.description": "minimal image for curl",
               "org.opencontainers.image.licenses": "MIT",
               "org.opencontainers.image.source": "https://github.com/curl/curl-container",
               "version": "8.7.1"
          },

I see small error in docker.cmd will fix