docs: update CHANGELOG.md

Author: bednar

CHANGELOG.md

@@ -6,6 +6,9 @@
 ### Deprecated
 1. [#264](https://github.com/influxdata/influxdb-client-python/pull/264): Deprecated `org_id` options BucketsApi.create_bucket in favor of `org` parameter
 
+### Documentation
+1. [#269](https://github.com/influxdata/influxdb-client-python/pull/269): Add new example: How to check connection credentials
+
 ## 1.18.0 [2021-06-04]
 
 ### Breaking Changes

examples/README.md

@@ -20,5 +20,5 @@
 - [influx_cloud.py](influx_cloud.py) - How to connect to InfluxDB 2 Cloud
 - [influxdb_18_example.py](influxdb_18_example.py) - How to connect to InfluxDB 1.8
 - [nanosecond_precision.py](nanosecond_precision.py) - How to use nanoseconds precision
-- [connection_check.py](connection_check.py) - How to check connection configuration
+- [connection_check.py](connection_check.py) - How to check connection credentials
 

examples/connection_check.py

@@ -1,5 +1,5 @@
 """
-How to How to check that connection information are suitable for queries and writes from/into specified bucket.
+How to check that connection credentials are suitable for queries and writes from/into specified bucket.
 """
 
 from influxdb_client import InfluxDBClient