update changelog

Author: Matt Sokoloff

CHANGELOG.md

@@ -3,10 +3,12 @@
 # Version 3.2.0 (2021-08-26)
 ## Added
 * List Bulk Import Requests for a project with `Project.bulk_import_requests()`
-* Bulk import attachments and data rows with `Dataset.create_data_rows()`
-* Local files can now be uploaded with `external_ids` when bulk creating data rows
+* Improvemens to `Dataset.create_data_rows()`
+    * Add attachments when bulk importing data rows
+    * Provide external ids when creating data rows from local files
+    * Get more informative error messages when the api rejects an import
 
-# Fix
+## Fix
 * Bug causing `project.label_generator()` to fail when projects had benchmarks
 
 # Version 3.1.0 (2021-08-18)