Update build badget

Author: mocsharp

README.md

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 [![License](https://img.shields.io/badge/license-Apache%202.0-green.svg)](LICENSE)
 [![codecov](https://codecov.io/gh/Project-MONAI/monai-deploy-informatics-gateway/branch/main/graph/badge.svg?token=34S8VI0XGD)](https://codecov.io/gh/Project-MONAI/monai-deploy-informatics-gateway)
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 MONAI Deploy Informatics Gateway (MIG) handles the first and last step in a clinical data pipeline, the Input, and Output (I/O).