chore(deps)(deps): bump prom/prometheus in /Backend

Bumps prom/prometheus from v3.7.3 to v3.9.1.

---
updated-dependencies:
- dependency-name: prom/prometheus
  dependency-version: v3.9.1
  dependency-type: direct:production
...

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Author: dependabot[bot]

Backend/compose.yaml

@@ -37,7 +37,7 @@ services:
     entrypoint: ["/bin/bash", "/scripts/refresh-collation.sh"]
 
   prometheus:
-    image: prom/prometheus:v3.7.3
+    image: prom/prometheus:v3.9.1
     container_name: openhd-prometheus-dev
     ports:
       - "9090:9090"