Merge branch 'remove-rack-attack-deprecation-warning-in-docs' into 'master'

Updates documentation to state that rack attack will be disabled by default…

See merge request gitlab-org/gitlab-ee!6653

doc/security/rack_attack.md

@@ -9,7 +9,7 @@ In case you find throttling is not enough to protect you against abusive clients
 Rack Attack offers IP whitelisting, blacklisting, Fail2ban style filtering and
 tracking.
 
-**Note:** Starting with 11.0, Rack Attack will be disabled by default. To continue
+**Note:** Starting with 11.2, Rack Attack is disabled by default. To continue
 using this feature, please enable it in your `gitlab.rb` by setting 
 `gitlab_rails['rack_attack_git_basic_auth'] = true`.