gui: Fix bar chart icon (fixes #5389)

gui/default/index.html

@@ -800,7 +800,7 @@
         <li><a class="navbar-link" href="https://syncthing.net/" target="_blank"><span class="fas fa-home"></span>&nbsp;<span translate>Home page</span></a></li>
         <li><a class="navbar-link" href="https://docs.syncthing.net/" target="_blank"><span class="fas fa-book"></span>&nbsp;<span translate>Documentation</span></a></li>
         <li><a class="navbar-link" href="https://forum.syncthing.net" target="_blank"><span class="fas fa-question-circle"></span>&nbsp;<span translate>Support</span></a></li>
-        <li><a class="navbar-link" href="https://data.syncthing.net/" target="_blank"><span class="fas fa-chart-bar"></span>&nbsp;<span translate>Statistics</span></a></li>
+        <li><a class="navbar-link" href="https://data.syncthing.net/" target="_blank"><span class="fas fa-bar-chart"></span>&nbsp;<span translate>Statistics</span></a></li>
         <li><a class="navbar-link" href="https://github.com/syncthing/syncthing/releases" target="_blank"><span class="far fa-file-alt"></span>&nbsp;<span translate>Changelog</span></a></li>
         <li><a class="navbar-link" href="https://github.com/syncthing/syncthing/issues" target="_blank"><span class="fas fa-bug"></span>&nbsp;<span translate>Bugs</span></a></li>
         <li><a class="navbar-link" href="https://github.com/syncthing/syncthing" target="_blank"><span class="fas fa-wrench"></span>&nbsp;<span translate>Source Code</span></a></li>