Merge branch 'welcome-jmiocene' into 'master'

Update welcome page

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/156514



Merged-by: Deepika Guliani <dguliani@gitlab.com>
Approved-by: Amy Qualls <aqualls@gitlab.com>
Approved-by: Annabel Dunstone Gray <annabel.dunstone@gmail.com>
Approved-by: Briley Sandlin <bsandlin@gitlab.com>
Approved-by: Max Orefice <morefice@gitlab.com>
Approved-by: Hitesh Raghuvanshi <hraghuvanshi@gitlab.com>
Approved-by: Deepika Guliani <dguliani@gitlab.com>
Approved-by: Adil Farrukh <afarrukh@gitlab.com>
Reviewed-by: Annabel Dunstone Gray <annabel.dunstone@gmail.com>
Reviewed-by: Max Orefice <morefice@gitlab.com>
Reviewed-by: Hitesh Raghuvanshi <hraghuvanshi@gitlab.com>
Co-authored-by: Julia Miocene <jmiocene@gitlab.com>