docs: add changelog entry for PR #10407

Author: gr8man

user_guide_src/source/changelogs/v4.7.5.rst

@@ -31,6 +31,7 @@ Bugs Fixed
 **********
 
 - **Logger:** Fixed a bug where interpolating a log message with array or non-stringable context values could raise PHP warnings or errors.
+- **filesystem_helper:** Fixed a bug where ``get_dir_file_info()`` could cause a null pointer error when ``get_file_info()`` returns null.
 
 See the repo's
 `CHANGELOG.md <https://github.com/codeigniter4/CodeIgniter4/blob/develop/CHANGELOG.md>`_