circleci -> github actions

.github/CONTRIBUTING.md

@@ -24,7 +24,7 @@ versus how you fixed it.
 * Sign the [Sonatype CLA](https://sonatypecla.herokuapp.com/sign-cla)
 * Try to fix one thing per pull request! Many people work on this code, so the more focused your changes are, the less
 of a headache other people will have when they merge their work in.
-* Ensure your Pull Request passes tests either locally or via CircleCI (it will run automatically on your PR)
+* Ensure your Pull Request passes tests either locally or via GitHub Actions (workflow will run on your PR)
 * Make sure to add yourself or your organization to CONTRIBUTORS.md as a part of your PR, if you are new to the project!
 * If you're stuck, ask our [gitter channel](https://gitter.im/sonatype/nexus-developers)! There are a number of
 experienced programmers who are happy to help with learning and troubleshooting.

.gitignore

@@ -7,6 +7,3 @@ target/
 .project
 .idea
 .DS_Store
-
-# ci config for local ci build
-.circleci/local-config.yml

README.md

@@ -25,7 +25,7 @@
 
 [![Gradle Plugins Portal](https://img.shields.io/maven-metadata/v/https/plugins.gradle.org/m2/org/sonatype/gradle/plugins/scan/org.sonatype.gradle.plugins.scan.gradle.plugin/maven-metadata.xml.svg?colorB=007ec6&label=Gradle%20Plugins%20Portal)](https://plugins.gradle.org/plugin/org.sonatype.gradle.plugins.scan)
 
-[![CircleCI Build Status](https://circleci.com/gh/sonatype-nexus-community/scan-gradle-plugin.svg?style=shield "CircleCI Build Status")](https://circleci.com/gh/sonatype-nexus-community/scan-gradle-plugin) 
+![GitHub Actions CI](https://github.com/sonatype-nexus-community/scan-gradle-plugin/actions/workflows/ci.yaml/badge.svg)
 
 Gradle plugin that scans the dependencies of a Gradle project using Sonatype platforms: OSS Index and Nexus IQ Server.