Merge pull request #1642 from ChristianLempa/renovate/docker.io-prom-prometheus-3.x

chore(deps): update docker.io/prom/prometheus docker tag to v3.9.0

library/compose/prometheus/compose.yaml.j2

@@ -1,7 +1,7 @@
 ---
 services:
   {{ service_name }}:
-    image: docker.io/prom/prometheus:v3.8.1
+    image: docker.io/prom/prometheus:v3.9.0
     restart: {{ restart_policy }}
     command:
       - --config.file=/etc/prometheus/prometheus.yaml

library/compose/prometheus/template.yaml

@@ -29,9 +29,9 @@ metadata:
     GitHub: https://github.com/prometheus/prometheus
 
     '
-  version: v3.8.1
+  version: v3.9.0
   author: Christian Lempa
-  date: '2025-12-16'
+  date: '2026-01-07'
   tags:
     - traefik
     - swarm