['guide for new' dialog] updated the image & etc. (#5996)

frontend/src/components/dialog/guide-for-new-dialog.js

@@ -19,8 +19,8 @@ class GuideForNewDialog extends React.Component {
         <ModalBody>
           <button type="button" className="close text-gray" onClick={this.toggle}><span aria-hidden="true">×</span></button>
           <div className="p-2 text-center">
-            <img src={`${mediaUrl}img/welcome.png`} width="180" alt="" />
-            <h3 id="dialogTitle">{gettext('Welcome to {site_name_placeholder}').replace('{site_name_placeholder}', siteName)}</h3>
+            <img src={`${mediaUrl}img/welcome.png`} width="408" alt="" />
+            <h3 id="dialogTitle" className="mt-6 mb-4">{gettext('Welcome to {site_name_placeholder}').replace('{site_name_placeholder}', siteName)}</h3>
             {canAddRepo ?
               <p>{gettext('{site_name_placeholder} organizes files into libraries. Each library can be synced and shared separately. We have created a personal library for you. You can create more libraries later.').replace('{site_name_placeholder}', siteName)}</p> :
               <p>{gettext('{site_name_placeholder} organizes files into libraries. Each library can be synced and shared separately. However, since you are a guest user now, you can not create libraries.').replace('{site_name_placeholder}', siteName)}</p>