Merge branch 'md-prompt-typo' into 'master'

Fix typo in zero shot agent prompt

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/138872



Merged-by: Tetiana Chupryna <tchupryna@gitlab.com>
Approved-by: Serhii Yarynovskyi <syarynovskyi@gitlab.com>
Approved-by: Tetiana Chupryna <tchupryna@gitlab.com>
Co-authored-by: Missy Davies <ms.melissadavies@gmail.com>