Add link to badge (#364)

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Co-authored-by: Vadim Makeev <pepelsbey@gmail.com>

README.md

 # Shower Presentation Template
-![](https://github.com/shower/shower/workflows/Test/badge.svg)
+[![Test status](https://github.com/shower/shower/workflows/Test/badge.svg)](https://github.com/shower/shower/actions/workflows/test.yml)
 
 <img src="pictures/logo.png" width="250" alt="Shower logo">