Update README.md

Signed-off-by: Radovenchyk <[email protected]>

Author: Radovenchyk

README.md

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 ![Cello](docs/images/favicon.png)
 
-![Build Status](https://github.com/hyperledger/cello/actions/workflows/docker-image.yml/badge.svg)
+[![Build Status](https://github.com/hyperledger/cello/actions/workflows/docker-image.yml/badge.svg)](https://github.com/hyperledger/cello/actions/workflows/docker-image.yml)
 
 Hyperledger Cello is a blockchain provision and operation system, which helps manage blockchain networks in an efficient way.