Merge branch 'hly-fix-graphiql-multiple-queries' into 'master'

Fix GraphQL Explorer error with multiple queries

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/169435



Merged-by: Coung Ngo <cngo@gitlab.com>
Approved-by: Coung Ngo <cngo@gitlab.com>
Reviewed-by: Heinrich Lee Yu <heinrich@gitlab.com>
Co-authored-by: Heinrich Lee Yu <heinrich@gitlab.com>