Fix whitespace in changelog

CHANGES.rst

@@ -13,9 +13,8 @@ Changelog
     to fix bilby workflow for O3-replay.
 -   Disable parameter estimation for MDC events as it is currently broken for
     them.
--   Add a Celery bootstep for external Kafka brokers
-
 -   Enable ingestion and processing of test SNEWS external events.
+-   Add a Celery bootstep for external Kafka brokers
 
 1.0.1 (2022-05-09)
 ------------------