Update index.md Fixed spelling mistake (#35246)

Author: markharwood101

aspnetcore/blazor/forms/index.md

@@ -368,7 +368,7 @@ To disable enhanced form handling:
 * For an <xref:Microsoft.AspNetCore.Components.Forms.EditForm>, remove the <xref:Microsoft.AspNetCore.Components.Forms.EditForm.Enhance%2A> parameter from the form element (or set it to `false`: `Enhance="false"`).
 * For an HTML `<form>`, remove the `data-enhance` attribute from form element (or set it to `false`: `data-enhance="false"`).
 
-Blazor's enhanced navigation and form handing may undo dynamic changes to the DOM if the updated content isn't part of the server rendering. To preserve the content of an element, use the `data-permanent` attribute.
+Blazor's enhanced navigation and form handling may undo dynamic changes to the DOM if the updated content isn't part of the server rendering. To preserve the content of an element, use the `data-permanent` attribute.
 
 In the following example, the content of the `<div>` element is updated dynamically by a script when the page loads: