Update upgrade/rendering-changes/4-3-0.md

Co-authored-by: Nadezhda Tacheva <73842592+ntacheva@users.noreply.github.com>

upgrade/rendering-changes/4-3-0.md

@@ -120,7 +120,7 @@ The 4.3.0 release brings about the following rendering changes for the Telerik U
 
 In an attempt to unify the look and feel of our components, the action buttons in all built-in dialogs now follow a common set of guidelines:
 
-* action buttons are now rendered inside a dedicated footer `<div class="k-actions">` element.
+* Action buttons are now rendered inside a dedicated footer `<div class="k-actions">` element.
 * the confirmation button always precedes the cancelation one, when such is present.
 * when part of a non-resizable dialog, the action buttons are stretched. Such an example is the Filter or the Column Menu.