Update release notes and readme after release (frequenz-floss#191)

Author: flora-hofmann-frequenz

README.md

@@ -30,7 +30,7 @@ Please also refer to [examples](https://github.com/frequenz-floss/frequenz-clien
 
 ```bash
 # Choose the version you want to install
-VERSION=0.17.0
+VERSION=0.17.1
 pip install frequenz-client-reporting==$VERSION
 ```
 

RELEASE_NOTES.md

@@ -6,8 +6,7 @@
 
 ## Upgrading
 
-- The `receive_aggregated_data` method now returns a `Receiver`, which provides more flexibility that the previous `AsyncIterator`.
-- The `receive_microgrid_sensors_data`, `receive_single_sensor_data` and `receive_aggregated_data` methods are no-longer `async`.
+<!-- Here goes notes on how to upgrade from previous versions, including deprecations and what they should be replaced with -->
 
 ## New Features