Fix link to detailed contributing doc.

Follow-up to https://github.com/openxla/iree/pull/14362
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index fd4f2c6..993f839 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -68,7 +68,7 @@
 ## Details
 
 For further details, see our
-[detailed contributing guide](/docs/developers/contributing.md), which is
+[detailed contributing guide](/docs/developers/developing_iree/contributing.md), which is
 separate to avoid notifying everyone every time it changes.
 
 ## Community Guidelines