Fix iterations autocomplete in RTE

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/175981



Merged-by: Enrique Alcántara <ealcantara@gitlab.com>
Approved-by: Nick Leonard <nleonard@gitlab.com>
Approved-by: Enrique Alcántara <ealcantara@gitlab.com>
Co-authored-by: Himanshu Kapoor <hkapoor@gitlab.com>