Update FindOnPage.md

Co-authored-by: MikeHillberg <18429489+MikeHillberg@users.noreply.github.com>

Author: maxwellmyers

FindOnPage.md

@@ -207,7 +207,7 @@ async Task ConfigureAndExecuteFindWithCustomUIAsync(string findTerm)
 
 #### Description
 Developers can retrieve the index of the currently active match 
-within a WebView2 control using the `GetActiveMatchIndex` method.
+within a WebView2 control using the `ActiveMatchIndex` property.
 
 
 ```cpp