Update CHANGES

Author: jschueller

CHANGES.rst

@@ -113,6 +113,7 @@ Bugs fixed
 * #13812 (discussion): LaTeX: long :rst:dir:`confval` value does not wrap at
   spaces in PDF.
   Patch by Jean-François B.
+* Avoid parallel workers depth write race in imgmath extension
 * #10785: Autodoc: Allow type aliases defined in the project to be properly
   cross-referenced when used as type annotations. This makes it possible
   for objects documented as ``:py:data:`` to be hyperlinked in function signatures.