[ci skip] Move changelog entry for PR #5391 from 3.1.8 to 3.1.9

Apparently I forgot to cherry-pick the actual change into 3.1-stable
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 36f6551..d2033ac 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -7,6 +7,10 @@
 
 Release Date: Not Released
 
+- **Security**
+
+   -  Updated :doc:`URL Helper <helpers/url_helper>` function :php:func:`auto_link()` to add ``rel="noopener"`` to generated links in order to prevent tab hijacking.
+
 -  General Changes
 
    -  Updated :doc:`Query Builder <database/query_builder>` method ``limit()`` to allow ``0`` values.
@@ -24,7 +28,6 @@
 
 - **Security**
 
-   -  Updated :doc:`URL Helper <helpers/url_helper>` function :php:func:`auto_link()` to add ``rel="noopener"`` to generated links in order to prevent tab hijacking.
    -  Updated :doc:`Security Library <libraries/security>` method ``xss_clean()`` to also filter JavaScript tag functions.
    -  Fixed a bug where :doc:`Security Library <libraries/security>` method ``xss_clean()`` didn't check for parentheses around JavaScript's ``document``.