Merge branch 'docs-fix-gitlab-ui-form-builder-typo' into 'master'

Fix typo in GitLab UI form builder docs

See merge request gitlab-org/gitlab!66756

doc/development/fe_guide/haml.md

@@ -31,7 +31,7 @@ For example:
 - Before:
 
   ```haml
-  = gitlab_ui_form_for @group do |f|
+  = form_for @group do |f|
     .form-group.gl-mb-3
       .gl-form-checkbox.custom-control.custom-checkbox
         = f.check_box :prevent_sharing_groups_outside_hierarchy, disabled: !can_change_prevent_sharing_groups_outside_hierarchy?(@group), class: 'custom-control-input'