Revise blog content for AWS Step Functions and API Gateway

Author: johanrin

…api-gateway-and-sam/images/79stnH5l6.png …and-sam/images/architecture-overview.pngcontent/en/posts/aws-step-functions-with-api-gateway-and-sam/images/79stnH5l6.png renamed to content/en/posts/aws-step-functions-with-api-gateway-and-sam/images/architecture-overview.png content/en/posts/aws-step-functions-with-api-gateway-and-sam/images/79stnH5l6.png renamed to content/en/posts/aws-step-functions-with-api-gateway-and-sam/images/architecture-overview.png

@@ -18,7 +18,7 @@ Let's start!
 
 In this post, we will deploy a basic Step Functions workflow behind an API Gateway that a simple POST request as below will trigger:
 
-![Architecture Overview](images/79stnH5l6.png)
+![Architecture Overview](images/architecture-overview.png)
 
 And because we use AWS SAM, it will only take us a few lines of YAML. Nothing more!
 
@@ -206,13 +206,13 @@ Our work is now deployed on AWS and ready to be triggered!
 
 For instance, with Postman:
 
-![Postman](images/TEHFmfnqq.jpg)
+![Postman](images/postman.jpg)
 
 And the associated result in AWS:
 
-![Workflow triggered](images/xllkWB6Fm.jpg)
+![Workflow triggered](images/workflow-triggered.jpg)
 
-### Conclusion
+## Conclusion
 
 You attached an API Gateway to a Step Functions workflow with AWS SAM! 🎉🎉