[ci skip] Fix a changelog entry
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 8f77f36..b1c5067 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -768,7 +768,7 @@
- Fixed a bug (#3161) - :doc:`Cache Library <libraries/caching>` methods `increment()`, `decrement()` didn't auto-create non-existent items when using redis and/or file storage.
- Fixed a bug (#3189) - :doc:`Parser Library <libraries/parser>` used double replacement on ``key->value`` pairs, exposing a potential template injection vulnerability.
- Fixed a bug (#3573) - :doc:`Email Library <libraries/email>` violated `RFC5321 <https://tools.ietf.org/rfc/rfc5321.txt>`_ by sending 'localhost.localdomain' as a hostname.
-- Fixed a bug (#3572) - :doc:`CI_Security::_remove_evil_attributes()` failed for large-sized inputs due to *pcre.backtrack_limit* and didn't properly match HTML tags.
+- Fixed a bug (#3572) - ``CI_Security::_remove_evil_attributes()`` failed for large-sized inputs due to *pcre.backtrack_limit* and didn't properly match HTML tags.
Version 2.2.1
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