Merge branch 'bojan/upgrade-rexml-gem' into 'master'

Update `rexml` gem

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/159768



Merged-by: Sylvester Chin <schin@gitlab.com>
Approved-by: Roy Liu <rliu@gitlab.com>
Approved-by: Sylvester Chin <schin@gitlab.com>
Co-authored-by: bmarjanovic <bmarjanovic@gitlab.com>