www/grafana9: Security update to 9.4.9

Changes: https://github.com/grafana/grafana/releases/tag/v9.4.9

PR: 271086
Reported by: Boris Korzun
MFH: 2023Q2
Security: 0b85b1cd-e468-11ed-834b-6c3be5272acd
Security: 5e257b0d-e466-11ed-834b-6c3be5272acd

(cherry picked from commit 7adde687773f581312f1fdcc6227914c90c8cddb)