[ai-conduct] Add link to issue

CODE_OF_AI_CONDUCT.md

diff --git a/CODE_OF_AI_CONDUCT.md b/CODE_OF_AI_CONDUCT.md
index 51975c6..27559a2 100644
--- a/CODE_OF_AI_CONDUCT.md
+++ b/CODE_OF_AI_CONDUCT.md
@@ -5,6 +5,9 @@
 submit. If a maintainer chooses to accept a machine-originated change directly,
 that maintainer takes the same responsibility for it.
 
+For discussion, concerns, and motivation behind this policy, see
+[#5790](https://github.com/harfbuzz/harfbuzz/issues/5790).
+
 ## Requirements
 
 - Use AI as a tool, not as an authority. Verify behavior, correctness, and