Break out of the loop when the key is found

The purpose of the loop is to loop through the flag keys and evaluate the one where `flag["key"] == key`. Once that key is found, there's no need to continue the loop.

posthog/client.py

@@ -701,6 +701,7 @@ def get_feature_flag(
                     except Exception as e:
                         self.log.exception(f"[FEATURE FLAGS] Error while computing variant locally: {e}")
                         continue
+                    break
 
         flag_was_locally_evaluated = response is not None
         if not flag_was_locally_evaluated and not only_evaluate_locally: