Fix ci error caused by branch merge.

SanftMonster · SanftMonster · commit 3f4686254060 · 2023-03-02T20:56:12.000+08:00
diff --git a/src/TensorFlowNET.Keras/Saving/KerasObjectLoader.cs b/src/TensorFlowNET.Keras/Saving/KerasObjectLoader.cs
@@ -517,7 +517,7 @@ void _add_children_recreated_from_config(Trackable obj, SavedObject proto, int n
                     if (obj_metrics.TryGetValue(refer.LocalName, out var metric))
                     {
                         var metric_path = $"{Keras.Saving.SavedModel.Constants.KERAS_ATTR}.layer_metrics.{refer.LocalName}";
-                        children.Add((metric, refer.NodeId, metric_path));
+                        children.Add((metric as Metric, refer.NodeId, metric_path));
                     }
                 }
             }

Original file line number	Diff line number	Diff line change
`@@ -517,7 +517,7 @@ void _add_children_recreated_from_config(Trackable obj, SavedObject proto, int n`
`517`	`517`	`if (obj_metrics.TryGetValue(refer.LocalName, out var metric))`
`518`	`518`	`{`
`519`	`519`	`var metric_path = $"{Keras.Saving.SavedModel.Constants.KERAS_ATTR}.layer_metrics.{refer.LocalName}";`
`520`		`- children.Add((metric, refer.NodeId, metric_path));`
	`520`	`+ children.Add((metric as Metric, refer.NodeId, metric_path));`
`521`	`521`	`}`
`522`	`522`	`}`
`523`	`523`	`}`