chore: add github trending badge

Author: C4illin

README.md

@@ -9,6 +9,7 @@
 ![GitHub commits since latest release](https://img.shields.io/github/commits-since/C4illin/ConvertX/latest)
 ![GitHub repo size](https://img.shields.io/github/repo-size/C4illin/ConvertX)
 ![Docker container size](https://ghcr-badge.egpl.dev/c4illin/convertx/size?color=%230375b6&tag=latest&label=image+size&trim=)
+<a href="https://trendshift.io/repositories/13818" target="_blank"><img src="https://trendshift.io/api/badge/repositories/13818" alt="C4illin%2FConvertX | Trendshift" style="width: 250px; height: 55px;" width="250" height="55"/></a>
 <!-- ![Dev image size](https://ghcr-badge.egpl.dev/c4illin/convertx/size?color=%230375b6&tag=main&label=dev+image&trim=) -->
 
 A self-hosted online file converter. Supports over a thousand different formats. Written with TypeScript, Bun and Elysia.