automation: Update docker-monitoring_grafana Docker tag to v11.3.1

This MR contains the following updates:

Package	Update	Change
docker-monitoring_grafana	patch	11.3.0 -> 11.3.1

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This MR has been generated by Renovate Bot.

enabled an automatic merge when the pipeline for 2e3bdc5f succeeds

mentioned in issue #2

merged

mentioned in commit 22cff899