Update Helm release prometheus-blackbox-exporter to v11.3.1

Author: renovate[bot]

fleet/lib/blackbox-exporter/fleet.yaml

@@ -8,7 +8,7 @@ helm:
   chart: &chart prometheus-blackbox-exporter
   releaseName: *chart
   repo: https://prometheus-community.github.io/helm-charts
-  version: 11.2.2
+  version: 11.3.1
   timeoutSeconds: 300
   waitForJobs: true
   valuesFiles: