Merge branch 'update-triage-handbook-url' into 'master'

Support Template: Update issue triage link

See merge request https://gitlab.com/gitlab-org/gitaly/-/merge_requests/7342



Merged-by: James Liu <jliu@gitlab.com>
Approved-by: Evan Read <eread@gitlab.com>
Approved-by: James Liu <jliu@gitlab.com>
Co-authored-by: Evan Read <eread@gitlab.com>
Co-authored-by: Katrin Leinweber <kleinweber@gitlab.com>