Update README.md

Updated Codacy badge after big fail and new association of FAST-OAD repo to Codacy

README.md

@@ -1,7 +1,7 @@
 ![Tests](https://github.com/fast-aircraft-design/FAST-OAD/workflows/Tests/badge.svg)
 [![codecov](https://codecov.io/gh/fast-aircraft-design/FAST-OAD/branch/master/graph/badge.svg)](https://codecov.io/gh/fast-aircraft-design/FAST-OAD)
 [![Documentation Status](https://readthedocs.org/projects/fast-oad/badge/?version=latest)](https://fast-oad.readthedocs.io/en/latest/?badge=latest)
-[![Codacy Badge](https://app.codacy.com/project/badge/Grade/e0f42000b8af4ee999dbdcc80eeabfdc)](https://www.codacy.com/gh/fast-aircraft-design/FAST-OAD?utm_source=github.com&utm_medium=referral&utm_content=fast-aircraft-design/FAST-OAD&utm_campaign=Badge_Grade)
+[![Codacy Badge](https://app.codacy.com/project/badge/Grade/9691f1d1430c45cf9c94bc342b4c6122)](https://www.codacy.com/gh/fast-aircraft-design/FAST-OAD?utm_source=github.com&utm_medium=referral&utm_content=fast-aircraft-design/FAST-OAD&utm_campaign=Badge_Grade)
 [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 [![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)