Update dependency markdownlint-cli to v0.19.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
markdownlint-cli	devDependencies	minor	0.18.0 -> 0.19.0

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Release Notes

igorshubovych/markdownlint-cli

### [`v0.19.0`](https://togithub.com/igorshubovych/markdownlint-cli/releases/v0.19.0) [Compare Source](https://togithub.com/igorshubovych/markdownlint-cli/compare/v0.18.0...v0.19.0) - Update `markdownlint` dependency to 0.17.1 - Adds automatic fix information for 24 rules - Updates newline handling to latest CommonMark specification - Improves MD014/MD037/MD039 - Implement `--fix` option to automatically fix basic issues in files - Improve format of error messages for usability/consistency - Address `npm audit` issues

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