docs: change assets / badges path in readme

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

README.md

@@ -2,7 +2,7 @@
 [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 [![Linting: Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/charliermarsh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff)
 [![Checked with mypy](https://www.mypy-lang.org/static/mypy_badge.svg)](https://mypy-lang.org/)
-![coverage](/../badges/coverage.svg)
+![coverage](/../assets/badges/coverage.svg)
 
 Slack logger implementing the python logging interface to be used with the standard logging tools in python.