Update gh action - fix json_path

Author: cfabriziohivemq

.github/workflows/copilot_metrics_retention.yaml

@@ -24,7 +24,7 @@
           with:
             GITHUB_TOKEN: ${{ secrets.PAT_TOKEN }}
             org_name: 'hivemq'
-            json_path: 'metrics.json'
+            json_path: 'metrics_hivemq.json'
 
         - name: Copilot Metrics Retention
           uses: ambilykk/copilot-metrics-retention@5b9ef15ce66fc883afb3b6127f960e44d5233a50