Update identity-provider-amazon.md

fixes https://github.com/MicrosoftDocs/azure-docs/issues/53212

Author: yoelhor

articles/active-directory-b2c/identity-provider-amazon.md

@@ -9,7 +9,7 @@ manager: celestedg
 ms.service: active-directory
 ms.workload: identity
 ms.topic: conceptual
-ms.date: 08/08/2019
+ms.date: 04/05/2020
 ms.author: mimart
 ms.subservice: B2C
 ---