Merge branch 'update-ssh-doc-metadata' into 'master'

Update metadata for SSH page

See merge request gitlab-org/gitlab!44322

doc/ssh/README.md

 ---
-stage: Create
-group: Source Code
+stage: Manage
+group: Access
 info: "To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers"
 type: howto, reference
 ---