[skip ci] Update CHANGELOG.md

Author: mdbenito

CHANGELOG.md

@@ -56,8 +56,10 @@
 
 ### Fixed
 
-- Fixed `show_warnings=False` not being respected in subprocesses
+- Fixed `show_warnings=False` not being respected in subprocesses. Introduced
+  `suppress_warninigs` decorator for more flexibility
   [PR #647](https://github.com/aai-institute/pyDVL/pull/647)
+  [PR #662](https://github.com/aai-institute/pyDVL/pull/662)
 - Fixed several bugs in diverse stopping criteria, including: iteration counts,
   computing completion, resetting, nested composition
   [PR #641](https://github.com/aai-institute/pyDVL/pull/641)