chore(deps): update docker.io/prom/prometheus docker tag to v3.8.0 (#1589)

* chore(deps): update docker.io/prom/prometheus docker tag to v3.8.0

* chore: sync template versions with image updates

---------

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

library/compose/prometheus/compose.yaml.j2

@@ -1,7 +1,7 @@
 ---
 services:
   {{ service_name }}:
-    image: docker.io/prom/prometheus:v3.7.3
+    image: docker.io/prom/prometheus:v3.8.0
     restart: {{ restart_policy }}
     command:
       - --config.file=/etc/prometheus/prometheus.yaml

library/compose/prometheus/template.yaml

@@ -19,9 +19,9 @@ metadata:
     Documentation: https://prometheus.io/docs/
 
     GitHub: https://github.com/prometheus/prometheus
-  version: v3.7.3
+  version: v3.8.0
   author: Christian Lempa
-  date: '2025-10-31'
+  date: '2025-12-12'
   tags:
     - traefik
     - swarm