fix(profile): add legacy root for old `core.ProfilePage.index`

Signed-off-by: skjnldsv <skjnldsv@protonmail.com>

lib/private/Route/Router.php

@@ -407,6 +407,9 @@ class Router implements IRouter {
 		if ($routeName === 'cloud_federation_api.requesthandlercontroller.receivenotification') {
 			return 'cloud_federation_api.requesthandler.receivenotification';
 		}
+		if ($routeName === 'core.ProfilePage.index') {
+			return 'profile.ProfilePage.index';
+		}
 		return $routeName;
 	}