chore: fix link to Go site (evcc-io#8545)

README.md

@@ -7,7 +7,7 @@
 [![OSS hosting by cloudsmith](https://img.shields.io/badge/OSS%20hosting%20by-cloudsmith-blue?logo=cloudsmith)](https://cloudsmith.io/~evcc/packages/)
 [![Latest Version](https://img.shields.io/github/release/evcc-io/evcc.svg)](https://github.com/evcc-io/evcc/releases)
 
-evcc is an extensible EV Charge Controller with PV integration implemented in [Go][2]. Featured in [PV magazine](https://www.pv-magazine.de/2021/01/15/selbst-ist-der-groeoenlandhof-wallbox-ladesteuerung-selbst-gebaut/).
+evcc is an extensible EV Charge Controller with PV integration implemented in [Go][1]. Featured in [PV magazine](https://www.pv-magazine.de/2021/01/15/selbst-ist-der-groeoenlandhof-wallbox-ladesteuerung-selbst-gebaut/).
 
 ![Screenshot](docs/screenshot.png)