Update README.md

Author: Kostadinos J Kyprianos

README.md

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-# Git Credential Manager
+![Sponsors](https://img.shields.io/github/sponsors/alexandros-thomson?style=for-the-badge)
+![Stars](https://img.shields.io/github/stars/alexandros-thomson/alexandros-thomson?style=for-the-badge)
+![Watchers](https://img.shields.io/github/watchers/alexandros-thomson/alexandros-thomson?style=for-the-badge)
+![Contributions](https://github-readme-stats.vercel.app/api?username=alexandros-thomson&show_icons=true&theme=radical)## Git Credential Manager
 
 [![Build Status][build-status-badge]][workflow-status]