config file as described in README.rst does not work

Describe the bug A clear and concise description of what the bug is.

To Reproduce Steps to reproduce the behavior:

1. create .bandit file with content:

[bandit]
tests: B101,B102,B301

2. run bandit -c .bandit -r module/
3. get error: [main] ERROR .bandit : Error parsing file.

Expected behavior working as described in readme

Bandit version

bandit 1.4.0

Additional context Docs say it should be YAML and not INI. https://bandit.readthedocs.io/en/latest/config.html