ENGCOM-5531: Resolve 'Merge On Conflict' missing the Label in 'New Synonym Group' form issue23953 #23954

 - Merge Pull Request #23954 from edenduong/magento2:2.3-bugfix/merge_on_flict_issue23953
 - Merged commits:
   1. c2de0ba

Author: magento-engcom-team

app/code/Magento/Search/view/adminhtml/ui_component/search_synonyms_form.xml

@@ -127,6 +127,7 @@
                             <map name="false" xsi:type="boolean">false</map>
                             <map name="true" xsi:type="boolean">true</map>
                         </valueMap>
+                        <description translate="true">Merge existing synonyms</description>
                     </settings>
                 </checkbox>
             </formElements>