Describe the bug
The --skip-domains argument is not accepting a list, for me. It works fine with a single URL in the list, but adding a second one causes it to fail.

To Reproduce
Steps to reproduce the behavior:

1. Add two URLs to the list after --skip-domains=.
2. Run markdown-checker.
3. See failure:

Usage: markdown-checker [OPTIONS] SRC ...
Try 'markdown-checker --help' for help.

Error: Invalid value for 'SRC ...': Path 'https://url-here.com]' does not exist.

Expected behavior
I expect that it should accept a list of multiple URLs. I may be wrong about this behavior.

Desktop (please complete the following information):

• OS: macOS
• Browser Waterfox
• Version macOS 15.6.1

Additional context
I can call --skip-domains twice to get both URLs skipped, so there is currently a workaround.