Update Lambda layer README.md (#179)

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Author: wangzlei

lambda-layer/README.md

@@ -1,6 +1,6 @@
-# AWS Distro Lambda Layer for NodeJS
+# AWS Lambda Layer for OpenTelemetry NodeJS
 
-This folder provides support for **Application Signals** in AWS Lambda environments. You can explore this repository to learn how to build a Lambda layer for AWS Node.js Runtimes from scratch in your AWS account. Alternatively, you can directly visit the AWS documentation, [Enable Application Signals on Lambda functions](https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/CloudWatch-Application-Signals-Enable-Lambda.html), and use the AWS-managed Lambda layers we provide.
+This folder provides support for **OpenTelemetry NodeJS** in AWS Lambda environments. You can explore this repository to learn how to build a Lambda layer for AWS Node.js Runtimes from scratch in your AWS account. Alternatively, you can directly visit the AWS documentation, [Enable OpenTelemetry on Lambda functions](https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/CloudWatch-Application-Signals-Enable-Lambda.html), and use the AWS-managed Lambda layers we provide.
 
 By default, the layer enables aws-sdk and aws-lambda instrumentation libraries only for better Lambda cold start
 performance.
@@ -12,8 +12,8 @@ Eg, OTEL_NODE_ENABLED_INSTRUMENTATIONS="aws-lambda,aws-sdk,http"
 
 This package includes the following three components,
 
-1. AWS Lambda Layer implementation for supporting Application Signals in AWS Lambda.
-2. Lambda Sample App with AWS SDK to demonstrate Application Signals telemetry data generated by Lambda Layer.
+1. AWS Lambda Layer implementation for supporting traces, metrics, logs in AWS Lambda.
+2. Lambda Sample App with AWS SDK to demonstrate AWS Application Signals telemetry data generated by Lambda Layer.
 3. Terraform script for deploy the sample app with Lambda layer built from the local package.
 
 ## Scripts to build everything