Update README.md to use version 0.2.2

Signed-off-by: Daniel Zullo <[email protected]>

Author: daniel-zullo-frequenz

README.md

@@ -30,7 +30,7 @@ You can install the Frequenz Electricity Trading API client via pip. Replace `VE
 
 ```
 # Choose the version you want to install
-VERSION=0.2.0
+VERSION=0.2.2
 pip install frequenz-client-electricity-trading==$VERSION
 ```