SONAR-22075 Fixes "How to Upgrade" links

server/sonar-web/src/main/js/apps/maintenance/components/App.tsx

@@ -233,7 +233,7 @@ export default class App extends React.PureComponent<Props, State> {
                     id="maintenance.sonarqube_is_under_maintenance.2"
                     values={{
                       link: (
-                        <DocumentationLink to="/setup-and-upgrade/upgrade-the-server/upgrade-guide/">
+                        <DocumentationLink to="/setup-and-upgrade/upgrade-the-server/roadmap/">
                           {translate('maintenance.sonarqube_is_under_maintenance_link.2')}
                         </DocumentationLink>
                       ),

server/sonar-web/src/main/js/components/upgrade/SystemUpgradeItem.tsx

@@ -94,10 +94,7 @@ export default function SystemUpgradeItem(props: SystemUpgradeItemProps) {
           {translateWithParameters('system.download_x', lastUpgrade.version)}
         </DownloadButton>
 
-        <DocumentationLink
-          className="sw-ml-2"
-          to="/setup-and-upgrade/upgrade-the-server/upgrade-guide/"
-        >
+        <DocumentationLink className="sw-ml-2" to="/setup-and-upgrade/upgrade-the-server/roadmap/">
           {translate('system.how_to_upgrade')}
         </DocumentationLink>
       </div>