CHANGELOG.md: Add note about bibliographicCitation

We need to match both of these citation fields:

- dc.identifier.citation
- dcterms.bibliographicCitation

CHANGELOG.md

@@ -10,6 +10,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Updated
 - Python dependencies
+- Regular expression to match all citation fields (dc.identifier.citation as
+well as dcterms.bibliographicCitation)
 
 ## [0.4.7] - 2021-03-17
 ### Changed

csv_metadata_quality/experimental.py

@@ -52,7 +52,7 @@ def correct_language(row):
             sample_strings.append(row[label])
 
         # Extract citation if it is present
-        match = re.match(r"^.*?citation.*$", label)
+        match = re.match(r"^.*?[cC]itation.*$", label)
         if match is not None:
             sample_strings.append(row[label])