docs: Update CHANGELOG.md

Author: bednar

CHANGELOG.md

@@ -1,7 +1,7 @@
 ## 1.40.0 [unreleased]
 
 ### Features
-1. [#625](https://github.com/influxdata/influxdb-client-python/pull/625) Make class `Point` equatable
+1. [#625](https://github.com/influxdata/influxdb-client-python/pull/625): Make class `Point` equatable
 
 ### Bug Fixes
 1. [#562](https://github.com/influxdata/influxdb-client-python/pull/562): Use `ThreadPoolScheduler` for `WriteApi`'s batch subject instead of `TimeoutScheduler` to prevent creating unnecessary threads repeatedly