Merge branch 'docs/expand-troubleshooting-invalid-jwt' into 'master'

Expand troubleshooting on invalid JWT errors

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/144089



Merged-by: Ashraf Khamis <akhamis@gitlab.com>
Approved-by: Luke Duncalfe <lduncalfe@gitlab.com>
Approved-by: Andy Soiron <asoiron@gitlab.com>
Approved-by: Ashraf Khamis <akhamis@gitlab.com>
Reviewed-by: Andy Soiron <asoiron@gitlab.com>
Reviewed-by: Luke Duncalfe <lduncalfe@gitlab.com>
Co-authored-by: Anton Smith <asmith@gitlab.com>
Co-authored-by: Andy Soiron <asoiron@gitlab.com>