docs: Fixed CHANGELOG.md

Signed-off-by: hayk96 <[email protected]>

Author: hayk96

CHANGELOG.md

@@ -6,7 +6,7 @@
 * [ENHANCEMENT] Added functionality to change the timestamp format while exporting data via the /export API. Previously, the default value was Unix timestamp. Now, you can choose from the following options: iso8601, rfc2822, rfc3339, friendly, and unix (default). #41
 * [ENHANCEMENT] Added a new feature that allows replacing Prometheus labels (fields) in the final dataset: CSV, JSON, etc. #39
 * [ENHANCEMENT] Added support for exporting files in multiple formats via the /export API. Supported formats include: CSV, YAML (or YML), JSON, and JSON Lines (or NDJSON). E.g., ?format=csv|yaml|yml|json|ndjson|jsonlines. #37
-* [ENHANCEMENT] Improved the functionality that generates CSV files to ensure they have unique names instead of static names, resolving issues with responses getting mixed up between users. #35
+* [BUGFIX] Fixed the functionality that generates CSV files to ensure they have unique names instead of static names, resolving issues with responses getting mixed up between users. #35
 * [BUGFIX] Fixed exception handling for replace_fields in the /export API. #43
 
 ## 0.4.0 / 2024-06-23