Change gitlab.de URL redirect

Details

• Point of contact for this request: @hbreuer-ext
• Service or process impacted: list services n/a

Support Needed

Support Request Details

The URL gitlab.de redirects to about.gitlab.com but it needs to redirect to:

about.gitlab.com/de-de/

People searching for gitlab.de are looking for German language content.

Related issue: https://gitlab.com/gitlab-com/gl-security/corp/infra/issue-tracker/-/issues/646