fix(ui5-tabcontainer): overflow menu button is added a title (#2639)

Fixes: #2607

Author: GerganaKremenska

packages/main/src/TabContainer.hbs

@@ -43,7 +43,7 @@
 					<ui5-button
 						icon="{{overflowMenuIcon}}"
 						design="Transparent"
-						aria-label="{{overflowMenuTitle}}"
+						title="{{overflowMenuTitle}}"
 						aria-haspopup="true"
 					></ui5-button>
 				{{/if}}