chore(deps): update dependency stylelint to v12

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
stylelint (source)	devDependencies	major	11.1.1 -> 12.0.0

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Release Notes

stylelint/stylelint

v12.0.0

Compare Source

• Removed: ignoring bower_components folder by default (#​4384).
• Removed: createRuleTester API (#​4385).
• Added: more information for custom formatters (#​4393).
• Fixed: comment-empty-line-before false positives for selector lists and shared-line comments (#​4360).
• Fixed: font-family-no-missing-generic-family-keyword false positives for Sass-variables with namespaces (#​4378).
• Fixed: font-weight-notation false positives for font-weight ranges in @font-face (#​4372).
• Fixed: length-zero-no-unit false positives for line-height, and for fr units (#​4394).
• Fixed: length-zero-no-unit false positives for Less variables (#​4405).
• Fixed: selector-max-* false negatives for rules with nested rules (#​4357).
• Fixed: incorrect error message when parsing files with a broken syntax (#​4364).

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     chore(deps): update dependency stylelint to v12

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