Add whistleblower to the post about contribution for Operação Serenata de Amor Project

[lipemorais]

What is the purpose of this Issue? The purpose of this issue is include Whistleblower project on the post with all repositories of the project.

What could be done to achieve this purpose? Write a extension to be included explaining about the Whistleblower should do the job.

[cuducos]

cc @Irio