chore: update openapi logo in readme

Author: TristanSpeakEasy

README.md

@@ -15,7 +15,8 @@
 
 <p align="center">
   <p align="center">
-    <img  width="200px" alt="OpenAPI" src="https://github.com/user-attachments/assets/555a0899-5719-42ee-b4b1-ece8d1d812ea">
+    <img  width="200px" alt="OpenAPI" src="https://github.com/user-attachments/assets/b9fa9c14-1c6f-4d8b-910f-15e5f962bab6">
+
   </p>
   <h1 align="center"><b>OpenAPI</b></h1>
   <p align="center">A set of packages and tools for working with <a href="https://www.speakeasy.com/openapi">OpenAPI Specification documents</a>. <br /> Used directly in Speakeasy's product to power our <a href="https://www.speakeasy.com/product/sdk-generation">SDK Generation</a> and <a href="https://www.speakeasy.com/product/gram">Gram</a> products.