Soften River load time warning

Replace specific "up to 3 minutes" estimate with gentler "please be patient"
phrasing for when the peer first starts.

Co-Authored-By: Claude <noreply@anthropic.com>

Author: sanity

hugo-site/themes/freenet/layouts/shortcodes/river-invite-button.html

@@ -131,7 +131,7 @@
             Open River & Join Chat
         </a>
 
-        <p class="note">Make sure Freenet is running. River may take up to 3 minutes to load while your peer connects to the network.</p>
+        <p class="note">Make sure Freenet is running. Please be patient—River may take a while to load when your peer first starts.</p>
     </div>
 
     <div id="invite-error" style="display: none;">