Update Readme.md

Author: kamilmysliwiec

Readme.md

@@ -42,7 +42,7 @@ Nest is an MIT-licensed open source project. It can grow thanks to the sponsors
 
 #### Principal Sponsor
 
-<a href="https://valor-software.com/"><img src="https://docs.nestjs.com/assets/sponsors/valor-software.png" width="210" /></a> 
+<a href="https://valor-software.com/"><img src="https://docs.nestjs.com/assets/sponsors/valor-software.png" width="320" /></a> 
 
 #### Sponsors
 <a href="https://scal.io"><img src="https://nestjs.com/img/scalio-logo.svg" width="160" /></a> &nbsp; <a href="https://www.swingdev.io"><img src="https://nestjs.com/img/swingdev-logo.svg#1" width="160" /></a>