update button selector

Author: Nazar65

app/code/Magento/MediaGalleryUi/Test/Mftf/Section/AdminEnhancedMediaGalleryMassActionSection.xml

@@ -11,6 +11,6 @@
         <element name="massActionCheckbox" type="button" selector="//input[@type='checkbox'][@data-ui-id ='{{imageName}}']" parameterized="true"/>
         <element name="totalSelected" type="text" selector=".mediagallery-massaction-items-count > .selected_count_text"/>
         <element name="cancelMassActionMode" type="button" selector="#cancel_massaction"/>
-        <element name="deleteSelected" type="button" selector="#delete_massaction"/>
+        <element name="deleteSelected" type="button" selector="#delete_selected_massaction"/>
     </section>
 </sections>