docs: adding official docs page in versions.md (#1340)

Author: praneetap

versions/2016-10-31.md

@@ -19,8 +19,9 @@ The AWS Serverless Application Model (SAM) is licensed under [The Apache License
 
 
 ## Introduction
+NOTE: SAM specification documentation is in process of being migrated to official [AWS SAM docs](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/what-is-sam.html) page, please take a look at the [SAM specification](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-specification.html) there.
 
-AWS SAM is a model used to define serverless applications on AWS.
+[AWS SAM](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-specification.html) is a model used to define serverless applications on AWS.
 
 Serverless applications are applications composed of functions triggered by events. A typical serverless application consists of one or more AWS Lambda functions triggered by events such as object uploads to [Amazon S3](https://aws.amazon.com/s3), [Amazon SNS](https://aws.amazon.com/sns) notifications, and API actions. Those functions can stand alone or leverage other resources such as [Amazon DynamoDB](https://aws.amazon.com/dynamodb) tables or S3 buckets. The most basic serverless application is simply a function.