Merge branch 'branches-api-update-example-response' into 'master'

Update examples in branches.md

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/130205



Merged-by: Amy Qualls <aqualls@gitlab.com>
Approved-by: Amy Qualls <aqualls@gitlab.com>
Co-authored-by: Katrin Leinweber <kleinweber@gitlab.com>