www/grafana: Update 13.0.1 => 13.1.1

Release notes:
https://grafana.com/docs/grafana/latest/whatsnew/whats-new-in-v13-1

Changelogs:
https://github.com/grafana/grafana/releases/tag/v13.1.0
https://github.com/grafana/grafana/releases/tag/v13.1.1

PR: 297047 296083
Sponsored by: UNIS Labs