Update README.md

Author: daniloopinheiro

README.md

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 ![post-fast-end-net](https://github.com/user-attachments/assets/01c4aa82-5bb3-4f35-b364-d423577cd70c)
 
 O titulo se dá ao nome *fast endpoints started aspnet*, que tem por base da construção [FastEndpoints](https://fast-endpoints.com/)
+[![.NET](https://github.com/daniloopinheiro/FastEndpointsNet/actions/workflows/dotnet.yml/badge.svg)](https://github.com/daniloopinheiro/FastEndpointsNet/actions/workflows/dotnet.yml)
 
 ## Índice