Update Readme.md

(actually just to bump build)

Readme.md

@@ -41,7 +41,7 @@ A huge thanks to everyone (individuals or organisations) who have sponsored Dapp
 - [Dapper Plus](https://dapper-plus.net/) is a major sponsor and is proud to contribute to the development of Dapper ([read more](https://dapperlib.github.io/Dapper/dapperplus))
 - [AWS](https://github.com/aws) who sponsored Dapper from Oct 2023 via the [.NET on AWS Open Source Software Fund](https://github.com/aws/dotnet-foss)
 
-<a href="https://www.learndapper.com/"><img width="728" height="90" alt="Dapper Plus logo" src="https://dapperlib.github.io/Dapper/dapper-sponsor.png" /></a>
+<a href="https://www.learndapper.com/"><img width="728" height="90" alt="Dapper Plus logo" src="https://raw.githubusercontent.com/DapperLib/Dapper/main/docs/dapper-sponsor.png" /></a>
 
 Features
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