docs: update sponsor banner

README.md

@@ -24,14 +24,10 @@ No dependencies & tree-shakable (Max 1.4 kB).
 > In addition to flag parsing, it supports argument parsing and has a beautiful `--help` documentation generator.
 
 <p align="center">
- <a href="https://privatenumber-sponsors.vercel.app/api/sponsor?tier=platinum">
-  <picture>
-  <source width="830" media="(prefers-color-scheme: dark)" srcset="https://privatenumber-sponsors.vercel.app/api/sponsor?tier=platinum&image=dark">
-  <source width="830" media="(prefers-color-scheme: light)" srcset="https://privatenumber-sponsors.vercel.app/api/sponsor?tier=platinum&image">
-  <img width="830" src="https://privatenumber-sponsors.vercel.app/api/sponsor?tier=platinum&image" alt="Premium sponsor banner">
-  </picture>
- </a>
+ <a href="https://github.com/sponsors/privatenumber/sponsorships?tier_id=398771"><img width="412" src="https://raw.githubusercontent.com/privatenumber/sponsors/master/banners/assets/donate.webp"></a>
+ <a href="https://github.com/sponsors/privatenumber/sponsorships?tier_id=397608"><img width="412" src="https://raw.githubusercontent.com/privatenumber/sponsors/master/banners/assets/sponsor.webp"></a>
 </p>
+<p align="center"><sup><i>Already a sponsor?</i> Join the discussion in the <a href="https://github.com/pvtnbr/tsx">Development repo</a>!</sup></p>
 
 ## 🚀 Install