Update GITLAB_PAGES_VERSION to latest commit

What does this MR do and why?

Update Gitlab Pages to latest commit

Link of the diff we're applying now: https://gitlab.com/gitlab-org/gitlab-pages/-/compare/f7184fef92c2dd87ef4306b265f9325b58ebf152...2a21892c80bd3b229073f091206247af66344dbe?from_project_id=734943&straight=false

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.