fix(action): Start rootful Docker daemon

The GitHub Actions runner hard-codes the Docker socket to
unix:///var/run/docker.sock, so all Docker actions that run after this
one fail attempting to connect to the stopped rootful Docker daemon.
Start the rootful Docker daemon back up to work around this issue.

action.yaml

@@ -61,6 +61,7 @@ runs:
           (PATH="/sbin:/usr/sbin:$PATH" dockerd-rootless.sh &) |&
           awaitDockerd
         fi
+        sudo systemctl start docker.service docker.socket
       env:
         FORCE_ROOTLESS_INSTALL: "1"
       shell: bash