request_metric: fix wrong key

backend/src/appenlight/models/services/request_metric.py

@@ -333,7 +333,7 b' class RequestMetricService(BaseService):'
                 for hit in bucket["top_calls_hits"]["hits"]["hits"]:
                     details[bucket["key"]].append(
                         {
-                            "report_id": hit["_source"]["request_metric_id"],
+                            "report_id": hit["_source"]["report_id"],
                             "group_id": hit["_source"]["group_id"],
                         }
                     )