ci: Fix build by adjusting PackageDiff

Author: carldebilly

build/PackageDiffIgnore.xml

@@ -1982,6 +1982,10 @@
 			<Member fullName="System.Threading.Tasks.Task`1&lt;System.Boolean&gt; Uno.UI.Helpers.TypeMappings.WaitForResume()" reason="Not really considered a public API, used by internal tooling" />
 			<Member fullName="System.Void Uno.UI.Helpers.TypeMappings.Resume(System.Boolean updateLayout)" reason="Not really considered a public API, used by internal tooling" />
 			<!-- END TypeMappings -->
+			
+			<!-- BEGIN DiagnosticsOverlay -->
+			<Member fullName="System.Void Uno.Diagnostics.UI.DiagnosticsOverlay.Add(System.String id, System.String name, Microsoft.UI.Xaml.UIElement preview, System.Func`1&lt;Microsoft.UI.Xaml.UIElement&gt; details)" reason="Recently public, nobody uses it yet." />
+			<!-- END DiagnosticsOverlay -->
 		</Methods>
 	</IgnoreSet>