Update CHANGELOG with NA values handling

NA values will now be rerun through the pipeline instead of being skipped.

Author: hechth

CHANGELOG.md

@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - Updated `matchms` dependency to `^0.30.0` in `pyproject.toml`.
+- NA values are now rerun through the pipeline instead of being skipped.
 
 ### Fixed