add changelog

Author: michalsn

user_guide_src/source/changelogs/v4.7.3.rst

@@ -42,6 +42,7 @@ Bugs Fixed
 - **Common:** Fixed a bug where the ``command()`` helper function did not properly clean up output buffers, which could lead to risky tests when exceptions were thrown.
 - **Database:** Fixed a bug where the SQLSRV driver's decrement method was adding instead of subtracting the decrement value when ``$castTextToInt`` was false.
 - **Kint:** Fixed a bug where stale Content Security Policy nonces were reused in worker mode, causing browser CSP violations for Debug Toolbar assets.
+- **Toolbar:** Fixed a bug where the Logs collector raised an undefined property error when using a third-party PSR-3 logger.
 - **Time:** Fixed a bug where ``Time::createFromTimestamp()`` could fail for microsecond timestamps when ``LC_NUMERIC`` used a comma decimal separator.
 - **Validation:** Fixed a bug where ``Validation::getValidated()`` dropped fields whose validated value was explicitly ``null``.