Updated diagram reference

Author: dbarkol

README.md

@@ -80,7 +80,7 @@ The project ships with reproducible **azd** infrastructure, so `azd up` will sta
 
 ### Architecture Diagram
 
-![Snippy Architecture](images/Snippy-Architecture-L.png)
+![Snippy Architecture](images/Snippy-Architecture-V2-L.png)
 
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