[Identity] Updated RenderSection to use async method. (#24121)

Author: marlongerson

src/Identity/UI/src/Areas/Identity/Pages/V4/_Layout.cshtml

@@ -89,6 +89,6 @@
         <script src="~/Identity/js/site.js" asp-append-version="true"></script>
     </environment>
 
-    @RenderSection("Scripts", required: false)
+    @await RenderSectionAsync("Scripts", required: false)
 </body>
 </html>