update circleCI to github actions (#239)

README.md

@@ -1,6 +1,6 @@
 [![Community Plus header](https://github.com/newrelic/opensource-website/raw/main/src/images/categories/Community_Plus.png)](https://opensource.newrelic.com/oss-category/#community-plus)
 
-# newrelic-lambda-extension [![Build Status](https://circleci.com/gh/newrelic/newrelic-lambda-extension.svg?style=svg)](https://circleci.com/gh/newrelic/newrelic-lambda-extension) [![Coverage](https://codecov.io/gh/newrelic/newrelic-lambda-extension/branch/main/graph/badge.svg?token=T73UEDVA5K)](https://codecov.io/gh/newrelic/newrelic-lambda-extension)
+# newrelic-lambda-extension [![Build Status](https://github.com/newrelic/newrelic-lambda-extension/actions/workflows/build-release-assets.yml/badge.svg)](https://github.com/newrelic/newrelic-lambda-extension/actions/workflows/build-release-assets.yml) [![Coverage](https://codecov.io/gh/newrelic/newrelic-lambda-extension/branch/main/graph/badge.svg?token=T73UEDVA5K)](https://codecov.io/gh/newrelic/newrelic-lambda-extension)
 
 An AWS Lambda extension to collect, enhance, and transport telemetry data from your AWS Lambda functions to New Relic without requiring an external transport such as CloudWatch Logs or Kinesis.