chore: update speakeasy sponsor graphic (#2078)

Author: chailandau

README.md

@@ -18,7 +18,7 @@ Ultra-fast fetching for TypeScript generated automatically from your OpenAPI sch
 
 <p align="center">
   <a href="https://zuplo.link/openapi-ts-gh"><img width="120" height="120" alt="Zuplo" src="https://avatars.githubusercontent.com/u/85497839?s=200&v=4"></a>
-  <a href="https://www.speakeasy.com/product/sdk-generation?utm_source=pow_openapi_ts" target="_blank"><img width="276" height="120" src="./docs/public/assets/speakeasy.svg" /></a>
+  <a href="https://www.speakeasy.com/product/sdk-generation?utm_source=pow_openapi_ts" target="_blank"><img width="288" height="120" src="./docs/public/assets/speakeasy.svg" /></a>
 </p>
 
 ### 🥈 Silver Sponsors