Warn on invalid certainty values

Change-Id: Ia6ec333036d25422b39cb72e7911da0c6571b95a
diff --git a/Changes b/Changes
index dc172e7..0e8520f 100644
--- a/Changes
+++ b/Changes
@@ -1,6 +1,8 @@
 0.43 2022-01-17
         - Fix temporary extract handling when defined
           in a config file.
+        - Improve handling of invalid certainty values
+          in TreeTagger.
 
 0.42 2022-01-11
         - Replaced Log4perl with Log::Any.