Merge pull request #194 from wneessen/OpenSSF-badge

Add OpenSSF Best Practices badge to README.md

README.md

@@ -11,7 +11,8 @@ SPDX-License-Identifier: CC0-1.0
 [![Go Report Card](https://goreportcard.com/badge/github.com/wneessen/go-mail)](https://goreportcard.com/report/github.com/wneessen/go-mail) 
 [![Mentioned in Awesome Go](https://awesome.re/mentioned-badge-flat.svg)](https://github.com/avelino/awesome-go)
 [![#go-mail on Discord](https://img.shields.io/badge/Discord-%23go%E2%80%93mail-blue.svg)](https://discord.gg/ysQXkaccXk) 
-[![REUSE status](https://api.reuse.software/badge/github.com/wneessen/go-mail)](https://api.reuse.software/info/github.com/wneessen/go-mail) 
+[![REUSE status](https://api.reuse.software/badge/github.com/wneessen/go-mail)](https://api.reuse.software/info/github.com/wneessen/go-mail)
+[![OpenSSF Best Practices](https://www.bestpractices.dev/projects/8701/badge)](https://www.bestpractices.dev/projects/8701)
 <a href="https://ko-fi.com/D1D24V9IX"><img src="https://uploads-ssl.webflow.com/5c14e387dab576fe667689cf/5cbed8a4ae2b88347c06c923_BuyMeACoffee_blue.png" height="20" alt="buy ma a coffee"></a>
 
 <p align="center"><img src="./assets/gopher2.svg" width="250" alt="go-mail logo"/></p>