fix: oada/services/users/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-INFLIGHT-6095116

Author: snyk-bot

oada/services/users/package.json

@@ -26,7 +26,7 @@
     "@oada/lib-arangodb": "workspace:^",
     "@oada/lib-config": "workspace:^",
     "@oada/lib-kafka": "workspace:^",
-    "@oada/lib-prom": "workspace:^",
+    "@oada/lib-prom": "3.5.1",
     "@oada/models": "workspace:^",
     "@oada/pino-debug": "workspace:^",
     "chalk": "^5.4.1",