Correct default AutomationProperties.Name for GridSplitter

Fixes #3372

Author: paulcam206

Microsoft.Toolkit.Uwp.UI.Controls/Strings/en-US/Resources.resw

@@ -202,7 +202,7 @@
     <comment>Narrator Resource for BladeView expanded status</comment>
   </data>
   <data name="WindowsCommunityToolkit_GridSplitter_AutomationName" xml:space="preserve">
-    <value>GridSpliter</value>
+    <value>GridSplitter</value>
     <comment>Narrator Resource for GridSplitter control</comment>
   </data>
   <data name="WindowsCommunityToolkit_InAppNotification_Events_NewNotificationMessage" xml:space="preserve">