fix(workflow): show the "Run" command only when the "Show" is available

mentioned in commit 4ea0e1cb

mentioned in merge request gitlab-org/workspaces/gitlab-workspaces-tools!12 (closed)

mentioned in merge request gitlab-org/workspaces/gitlab-workspaces-tools!26 (merged)

mentioned in merge request gitlab-org/workspaces/gitlab-workspaces-tools!28 (closed)