spelling: returns

Signed-off-by: Josh Soref <[email protected]>

Author: jsoref

src/google/adk/evaluation/agent_evaluator.py

@@ -559,7 +559,7 @@ async def _get_eval_results_by_eval_id(
   def _get_eval_metric_results_with_invocation(
       eval_results_per_eval_id: list[EvalCaseResult],
   ) -> dict[str, list[_EvalMetricResultWithInvocation]]:
-    """Retruns _EvalMetricResultWithInvocation grouped by metric.
+    """Returns _EvalMetricResultWithInvocation grouped by metric.
 
     EvalCaseResult contain results for each metric per invocation.