CHANGELOG.md: Fix link to an issue #238.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ef1cb39..e151808 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,7 +10,7 @@ Fixes:
Fix quadratic time behavior caused by one-by-one walking over block lines
instead of calling `md_lookup_line()`.
- - [#237](https://github.com/mity/md4c/issues/237):
+ - [#238](https://github.com/mity/md4c/issues/238):
Fix quadratic time and output size behavior caused by malicious misuse of
link reference definitions.