fix(docs): add github actions badge, remove azure pipelines badge (#334)

Author: Anemy

README.md

@@ -1,6 +1,6 @@
 # MongoDB for VS Code ![PREVIEW](https://img.shields.io/badge/-PREVIEW-orange)
 
-[![Build Status](https://dev.azure.com/team-compass/vscode/_apis/build/status/mongodb-js.vscode?branchName=main)](https://dev.azure.com/team-compass/vscode/_build/latest?definitionId=10&branchName=main)
+[![Build Status](https://github.com/mongodb-js/vscode/actions/workflows/test-and-build.yaml/badge.svg?branchName=main)](https://github.com/mongodb-js/vscode/actions/workflows/test-and-build.yaml)
 
 MongoDB for VS Code makes it easy to work with MongoDB, whether your own instance or in [MongoDB Atlas](https://www.mongodb.com/cloud/atlas/register).