Update changelog.txt

Co-authored-by: Bas Alberts <[email protected]>

Author: kevinbackhouse

changelog.txt

@@ -10,9 +10,6 @@
   * Fixed strict prototype clang warning (#310)
   * Fixed regression test (#312)
 
-  Note: these changes remove redundant bold tag nesting which may result
-  in existing rendering tests failing, e.g. rendering "____bold____" to html
-  will no longer yield "<p><strong><strong>bold</strong></strong></p>".
 
 [0.29.0.gfm.10]