chore(deps): update prom/prometheus docker tag to v3.8.1

Author: renovate[bot]

examples/example-exemplars-tail-sampling/docker-compose.yaml

@@ -43,7 +43,7 @@ services:
     command:
       - --config=file:/config.yaml
   prometheus:
-    image: prom/prometheus:v3.8.0@sha256:d936808bdea528155c0154a922cd42fd75716b8bb7ba302641350f9f3eaeba09
+    image: prom/prometheus:v3.8.1@sha256:2b6f734e372c1b4717008f7d0a0152316aedd4d13ae17ef1e3268dbfaf68041b
     network_mode: host
     volumes:
       - ./config/prometheus.yaml:/prometheus.yaml

examples/example-exporter-opentelemetry/docker-compose.yaml

@@ -20,7 +20,7 @@ services:
     command:
       - --config=file:/config.yaml
   prometheus:
-    image: prom/prometheus:v3.8.0@sha256:d936808bdea528155c0154a922cd42fd75716b8bb7ba302641350f9f3eaeba09
+    image: prom/prometheus:v3.8.1@sha256:2b6f734e372c1b4717008f7d0a0152316aedd4d13ae17ef1e3268dbfaf68041b
     network_mode: host
     volumes:
       - ./config/prometheus.yaml:/prometheus.yaml

examples/example-native-histogram/docker-compose.yaml

@@ -10,7 +10,7 @@ services:
       - -jar
       - /example-native-histogram.jar
   prometheus:
-    image: prom/prometheus:v3.8.0@sha256:d936808bdea528155c0154a922cd42fd75716b8bb7ba302641350f9f3eaeba09
+    image: prom/prometheus:v3.8.1@sha256:2b6f734e372c1b4717008f7d0a0152316aedd4d13ae17ef1e3268dbfaf68041b
     network_mode: host
     volumes:
       - ./docker-compose/prometheus.yml:/prometheus.yml