chore: update readme with weblate badge (#1126)

README.md

@@ -3,6 +3,7 @@
 <p align="center">
   <a href="https://github.com/usememos/memos/stargazers"><img alt="GitHub stars" src="https://img.shields.io/github/stars/usememos/memos" /></a>
   <a href="https://hub.docker.com/r/neosmemo/memos"><img alt="Docker pull" src="https://img.shields.io/docker/pulls/neosmemo/memos.svg" /></a>
+  <a href="https://hosted.weblate.org/engage/memos/"><img src="https://hosted.weblate.org/widgets/memos/-/svg-badge.svg" alt="Translation status" /></a>
   <a href="https://discord.gg/tfPJa4UmAv"><img alt="Discord" src="https://img.shields.io/badge/discord-chat-5865f2?logo=discord&logoColor=f5f5f5" /></a>
 </p>