Merge branch 'russell/fix-vault-metadata' into 'master'

Fix metadata of Vault docs page

See merge request gitlab-org/gitlab!76186

doc/integration/vault.md

 ---
-stage: Release
-group: Release
+stage: Configure
+group: Configure
 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/#assignments
 ---