update changelog [ci skip]

Author: michalsn

user_guide_src/source/changelogs/v4.3.4.rst

@@ -27,7 +27,7 @@ Deprecations
 Bugs Fixed
 **********
 
-- **CURLRequest:** Clear response headers between requests.
+- **CURLRequest:** Fixed a bug where the response class was shared between requests.
 
 See the repo's
 `CHANGELOG.md <https://github.com/codeigniter4/CodeIgniter4/blob/develop/CHANGELOG.md>`_