Update README.md

Update README.md

diff --git a/README.md b/README.md
index bd06c6d..70fb09b 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,3 @@
 # discourse-category-experts
+
+Wiki here - https://meta.discourse.org/t/discourse-category-experts/190814

GitHub sha: a191b0d1