fix: replace bare except with except Exception in prometheus_discovery_utils.py

Author: harshadkhetpal

src/robusta/core/sinks/robusta/prometheus_discovery_utils.py

@@ -73,7 +73,7 @@ def _get_query_prometheus_value(self, query: str) -> Optional[float]:
             value = query_result.vector_result[0]["value"]["value"]
             return_value = float("%.2f" % float(value))
             return return_value if return_value >= 0 else None
-        except:
+        except Exception:
             logging.exception("PrometheusDiscoveryUtils failed to get prometheus results.")
             return