chore: update readme

Added LambdaTest to sponsorship section
Signed-off-by: boojack <stevenlgtm@gmail.com>

README.md

@@ -17,7 +17,15 @@ An open-source, self-hosted note-taking service. Your thoughts, your data, your
 [**Warp** — The AI-powered terminal built for speed and collaboration](https://go.warp.dev/memos)
 
 <a href="https://go.warp.dev/memos" target="_blank" rel="noopener">
-  <img src="https://raw.githubusercontent.com/warpdotdev/brand-assets/main/Github/Sponsor/Warp-Github-LG-02.png" alt="Warp - The terminal for the 21st century" height="300" />
+  <img src="https://raw.githubusercontent.com/warpdotdev/brand-assets/main/Github/Sponsor/Warp-Github-LG-02.png" alt="Warp - The AI-powered terminal built for speed and collaboration" width="512" />
+</a>
+
+---
+
+[**LambdaTest** - Cross-browser testing cloud](https://www.lambdatest.com/?utm_source=memos&utm_medium=sponsor)
+  
+<a href="https://www.lambdatest.com/?utm_source=memos&utm_medium=sponsor" target="_blank" rel="noopener">
+  <img src="https://www.lambdatest.com/blue-logo.png" alt="LambdaTest - Cross-browser testing cloud" height="50" />
 </a>
 
 ## Overview
@@ -110,11 +118,6 @@ We welcome contributions of all kinds! Whether you're fixing bugs, adding featur
 
 Love Memos? [Sponsor us on GitHub](https://github.com/sponsors/usememos) to help keep the project growing!
 
-**Featured Supportors:**
-
-<a href="https://github.com/fixermark" target="_blank"><img src="https://avatars.githubusercontent.com/u/169982?v=4" alt="fixermark" height="50" style="border-radius: 50%; margin: 5px;" /></a>
-<a href="https://github.com/alik-agaev" target="_blank"><img src="https://avatars.githubusercontent.com/u/2662697?v=4" alt="alik-agaev" height="50" style="border-radius: 50%; margin: 5px;" /></a>
-
 ## Star History
 
 [![Star History Chart](https://api.star-history.com/svg?repos=usememos/memos&type=Date)](https://star-history.com/#usememos/memos&Date)