fix(ui5-checkbox): set aria-hidden attribute (#2828)

Input element now has aria-hidden="true" instead of role="none", to not be mapped to the accessibility tree.

Fixes: #2786

Author: dobrinyonkov

packages/main/src/CheckBox.hbs

@@ -24,7 +24,7 @@
 				?checked="{{checked}}"
 				?readonly="{{readonly}}"
 				?disabled="{{disabled}}"
-				role="none"
+				aria-hidden="true"
 				data-sap-no-tab-ref
 			/>
 		</div>