ICU Fixathon - clean up React.Fragment old syntax (#29006)

* ICU Fixathon - clean up React.Fragment old syntax

* enforce use of fragment shorthand over React.Fragment

* use short version of fragment

webapp/channels/src/plugins/channel_header_plug/channel_header_plug.tsx

@@ -338,7 +338,7 @@ class ChannelHeaderPlug extends React.PureComponent<ChannelHeaderPlugProps, Chan
                                 />
                             }
                         >
-                            <React.Fragment>
+                            <>
                                 <PluginChannelHeaderIcon
                                     id='pluginChannelHeaderIcon'
                                     className='icon icon--standard icon__pluginChannelHeader'
@@ -350,7 +350,7 @@ class ChannelHeaderPlug extends React.PureComponent<ChannelHeaderPlugProps, Chan
                                 >
                                     {items.length}
                                 </span>
-                            </React.Fragment>
+                            </>
                         </WithTooltip>
                     </CustomToggle>
                     <CustomMenu

webapp/channels/src/plugins/pluggable/pluggable.tsx

@@ -123,8 +123,8 @@ export default function Pluggable(props: Props): JSX.Element | null {
     }
 
     return (
-        <React.Fragment>
+        <>
             {content}
-        </React.Fragment>
+        </>
     );
 }