release notes for app config (#1642)

releases/2020-08/python.md

@@ -14,6 +14,7 @@ The Azure SDK team is pleased to make available the August 2020 client library r
 
 #### Updates
 
+- App Configuration
 - Identity
 - Text Analytics
 - Key Vault
@@ -29,6 +30,7 @@ The Azure SDK team is pleased to make available the August 2020 client library r
 To install the latest preview version of the packages, copy and paste the following commands into a terminal:
 
 ```bash
+pip install azure-appconfiguration
 pip install azure-identity
 pip install azure-ai-textanalytics
 pip install --pre azure-servicebus