Added lint badge to readme

README.md

@@ -1,4 +1,5 @@
 [![Go test](https://github.com/dedis/kyber/actions/workflows/tests.yml/badge.svg)](https://github.com/dedis/kyber/actions/workflows/tests.yml)
+[![Go lint](https://github.com/dedis/kyber/actions/workflows/golangci-lint.yml/badge.svg)](https://github.com/dedis/kyber/actions/workflows/golangci-lint.yml)
 [![Coverage Status](https://coveralls.io/repos/github/dedis/kyber/badge.svg?branch=master)](https://coveralls.io/github/dedis/kyber?branch=master)
 [![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=dedis_kyber&metric=alert_status)](https://sonarcloud.io/summary/new_code?id=dedis_kyber)
 [![Go Reference](https://pkg.go.dev/badge/github.com/dedis/kyber.svg)](https://pkg.go.dev/github.com/dedis/kyber)