Update Prometheus to v3.12.0

Author: renovate[bot]

charts/newrelic-prometheus-agent/Chart.yaml

@@ -5,7 +5,7 @@ type: application
 version: 2.10.0
 # Prometheus Server Version
 # https://pkg.go.dev/github.com/prometheus/prometheus#readme-prometheus-code-base
-appVersion: "v3.11.3"
+appVersion: "v3.12.0"
 annotations:
   configuratorVersion: "2.10.0"
 dependencies: