docs: update CHANGELOG.md

bednar · bednar · commit 55a248992255 · 2021-09-30T11:34:48.000+02:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,8 @@
 ## 1.22.0 [unreleased]
 
+### Features
+1. [#335](https://github.com/influxdata/influxdb-client-python/pull/335): Add supports for custom precision for index specified as number [DataFrame] 
+
 ## 1.21.0 [2021-09-17]
 
 ### Features
