docs: 📝 update readme

Author: AkashRajpurohit

README.md

@@ -11,6 +11,7 @@
     <img alt="Visitors count" src="https://visitor-badge.laobi.icu/badge?page_id=@akashrajpurohit~git-sync.visitor-badge&style=flat-square">
     <a target="_blank" href="https://github.com/AkashRajpurohit/git-sync/releases"><img src="https://img.shields.io/github/go-mod/go-version/AkashRajpurohit/git-sync?filename=go.mod" /></a>
     <a target="_blank" href="https://ko-fi.com/akashrajpurohit"><img src="https://img.shields.io/badge/Ko--fi-F16061?style=flat-square&logo=ko-fi&logoColor=white" /></a>
+    <a target="_blank" href="https://akashrajpurohit.com/sponsors/?ref=git-sync"><img src="https://img.shields.io/badge/Sponsor-AkashRajpurohit-F16061?style=flat-square&logoColor=white" /></a>
     <a target="_blank" href="https://github.com/AkashRajpurohit/git-sync/releases"><img src="https://img.shields.io/github/v/release/AkashRajpurohit/git-sync?display_name=tag" /></a>
     <a href="#-contributors"><img alt="All Contributors" src="https://img.shields.io/github/all-contributors/AkashRajpurohit/git-sync?color=1f85bf"></a>
     <a target="_blank" href="https://github.com/AkashRajpurohit/git-sync"><img src="https://img.shields.io/github/stars/AkashRajpurohit/git-sync" /></a>