Add changelog entry

Author: facelessuser

docs/changelog.md

@@ -17,6 +17,7 @@ See the [Contributing Guide](contributing.md) for details.
 * Ensure nested elements inside inline comments are properly unescaped (#1571).
 * Make the docs build successfully with mkdocstrings-python 2.0 (#1575).
 * Fix infinite loop when multiple bogus or unclosed HTML comments appear in input (#1578).
+* Fix another infinite loop when handling bad comments (#1586).
 
 ## [3.10.0] - 2025-11-03