Update README.md

Author: philipp-meier

README.md

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 # gw2-cli
 [![Build](https://github.com/philipp-meier/gw2-cli/actions/workflows/rust.yml/badge.svg?branch=main)](https://github.com/philipp-meier/gw2-cli/actions/workflows/rust.yml)
-[![MIT License](https://img.shields.io/badge/license-MIT-green.svg)](https://github.com/mockito/mockito/blob/main/LICENSE)
+[![MIT License](https://img.shields.io/badge/license-MIT-green.svg)](https://github.com/philipp-meier/gw2-cli/blob/main/LICENSE)
 
 Simple, neofetch-like command line tool for displaying Guild Wars 2 stats by using the official API.