markdownlint argument -c/--config ignores any input

[subwaystation]

nf-core/pangenome feature request

Hi there!

Describe the solution you'd like

For an overview of the issue take a look at DavidAnson/markdownlint#373.

Once markdownlint is fixed, I have to remove the .markdownlint.yml in the root directory of the repository and all markdown linting tests should run smoothly.