Merge branch 'update-data-classification-links' into 'master'

Update link to data classification policy

See merge request gitlab-org/gitlab!42012

doc/administration/geo/replication/security_review.md

@@ -37,7 +37,7 @@ from [owasp.org](https://owasp.org/).
   private projects. Geo replicates them all indiscriminately. “Selective sync”
   exists for files and repositories (but not database content), which would permit
   only less-sensitive projects to be replicated to a **secondary** node if desired.
-- See also: [GitLab data classification policy](https://about.gitlab.com/handbook/engineering/security/data-classification-policy.html).
+- See also: [GitLab data classification policy](https://about.gitlab.com/handbook/engineering/security/data-classification-standard.html).
 
 ### What data backup and retention requirements have been defined for the application?