Merge branch '467375-update-json-schemer' into 'master'

Upgrade `json_schemer` to 2.3.0

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/158216



Merged-by: Sashi Kumar Kumaresan <skumar@gitlab.com>
Approved-by: Mehmet Emin INAC <minac@gitlab.com>
Approved-by: Andy Schoenen <asoiron@gitlab.com>
Approved-by: Sashi Kumar Kumaresan <skumar@gitlab.com>
Co-authored-by: Avielle Wolfe <awolfe@gitlab.com>