Update _index.en.md

Fix grammar

Author: asyncful

workshop/content/javascript/buildpipe/howto/_index.en.md

@@ -19,6 +19,6 @@ In this workshop, we are going to use the AWS Cloud Development Kit (also known
 
 That's right! You can describe your infrastructure by writing code in TypeScript, C#, Python or Java. Your code is then synthesized into CloudFormation and using the CDK CLI you can deploy it to an AWS account. 
 
-### How does SAM and CDK play together?
+### How do SAM and CDK play together?
 
-Serverless developers use the SAM framework to define their applications, SAM CLI to build them and deploy them and AWS CDK to provision any infrastructure related resources, like their CI/CD Pipeline. The nice thing about these tools is that they all share a common ground: CloudFormation. 
+Serverless developers use the SAM framework to define their applications, SAM CLI to build them and deploy them and AWS CDK to provision any infrastructure related resources, like their CI/CD Pipeline. The nice thing about these tools is that they all share a common ground: CloudFormation.