ghwikipp: README: Update notes about build_categories.php

From 30f458263b698a8151a2f1a1b95c6733d7b7a941 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Thu, 16 May 2024 15:22:31 -0400
Subject: [PATCH] README: Update notes about build_categories.php

---
 README.md | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 3013817..20ef340 100644
--- a/README.md
+++ b/README.md
@@ -204,8 +204,10 @@ Mark a few people as admins, so they can mark people as trusted to make
 direct pushes instead of pull requests, as appropriate.
 
 * Set up a cronjob to run build_categories.php, if you want the wikibot
-to build category pages and push them. This is an experimental feature
-atm.
+to build category pages and push them. Once an hour or once a day is probably
+fine. SDL currently has a small script that runs when the wiki's git
+repository gets new pushes that runs build_categories.php every time, for
+faster updates.
 
 * Install codesearch: