www/grafana9: Update to 9.2.7 (CVE-2022-31097)

ChangeLog:
https://grafana.com/blog/2022/11/29/grafana-security-release-new-versions-with-high-severity-security-fix-for-cve-2022-31097/

PR: 268078
Reported by: drtr0jan@yandex.ru (maintainer)
MFH: 2022Q4 (security release)
Security: CVE-2022-31097

(cherry picked from commit 88270fe5a24f6286e7c774be0fa8825ee47981a6)