fix: render mentions in private chat message body

ts/components/conversation/message/message-content/MessageBody.tsx

@@ -33,7 +33,7 @@ const renderNewLines: RenderTextCallbackType = ({ text: textWithNewLines, key, i
     <AddNewLines
       key={key}
       text={textWithNewLines}
-      renderNonNewLine={isGroup ? renderMentions : renderTextDefault}
+      renderNonNewLine={renderMentions}
       isGroup={isGroup}
     />
   );