Update README.md

Adding the DPGA badge

Author: RobertMacTavish

README.md

@@ -1,5 +1,5 @@
 <!-- Copyright (c) 2014 - 2023 UNICEF. All rights reserved. -->
-
+[![DPG Badge](https://img.shields.io/badge/Verified-DPG-3333AB?logo=data:image/svg%2bxml;base64,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)](https://digitalpublicgoods.net/r/dpg-slug)
 Primero
 ========
 [![Build Status](https://github.com/primeroIMS/primero/actions/workflows/app.yml/badge.svg?branch=main)](https://github.com/primeroIMS/primero/actions)