Update prom/prometheus Docker tag to v3.8.1 (#907)

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

Author: renovate[bot]

docker-compose.metrics.yaml

@@ -4,7 +4,7 @@ networks:
 
 services:
   prometheus:
-    image: prom/prometheus:v3.8.0
+    image: prom/prometheus:v3.8.1
     command:
       - --web.enable-remote-write-receiver
       - --enable-feature=native-histograms