docs: fix broken license link (#3028)

Author: maratori

docs/src/docs/index.mdx

@@ -6,7 +6,7 @@ import { FaTwitter, FaSlack } from "react-icons/fa";
 import { IconContainer } from "lib/icons";
 
 ![Build Status](https://github.com/golangci/golangci-lint/workflows/CI/badge.svg)
-[![License](https://img.shields.io/github/license/golangci/golangci-lint)](/LICENSE)
+[![License](https://img.shields.io/github/license/golangci/golangci-lint)](https://github.com/golangci/golangci-lint/blob/master/LICENSE)
 [![Release](https://img.shields.io/github/release/golangci/golangci-lint.svg)](https://github.com/golangci/golangci-lint/releases/latest)
 [![Docker](https://img.shields.io/docker/pulls/golangci/golangci-lint)](https://hub.docker.com/r/golangci/golangci-lint)
 [![GitHub Releases Stats of golangci-lint](https://img.shields.io/github/downloads/golangci/golangci-lint/total.svg?logo=github)](https://somsubhra.github.io/github-release-stats/?username=golangci&repository=golangci-lint)