Update Helm release generic-prometheus-alerts to v1.11.6 (#767)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

helm_deploy/hmpps-strengths-based-needs-assessments-ui/Chart.yaml

@@ -8,5 +8,5 @@ dependencies:
     version: "3.9"
     repository: https://ministryofjustice.github.io/hmpps-helm-charts
   - name: generic-prometheus-alerts
-    version: 1.11.4
+    version: 1.11.6
     repository: https://ministryofjustice.github.io/hmpps-helm-charts