Update apigw-rest-api-lambda-dotnet/README.md

Co-authored-by: Ben <9841563+bfreiberg@users.noreply.github.com>

Author: seshubaws

apigw-rest-api-lambda-dotnet/README.md

@@ -2,7 +2,7 @@
 
 This project contains source code and supporting files for a serverless application that you can deploy with the AWS SAM CLI. It includes the following files and folders.
 
-- src/hello_world - Code for the application's Lambda function.
+- src/HelloWorld - Code for the application's Lambda function.
 - events - Invocation events that you can use to invoke the function.
 - template.yaml - A template that defines the application's AWS resources.