chore(dev-deps): update dependency stylelint-config-recommended to v15

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
stylelint-config-recommended	14.0.1 -> 15.0.0

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Release Notes

stylelint/stylelint-config-recommended (stylelint-config-recommended)

v15.0.0

Compare Source

This release replaces four rules with broader and more capable ones that validate CSS against syntaxes defined by W3C: at-rule-descriptor-value-no-unknown, at-rule-prelude-no-invalid and declaration-property-value-no-unknown.

• Removed: stylelint less than 16.13.0 from peer dependencies.
• Removed: color-no-invalid-hex rule.
• Removed: function-linear-gradient-no-nonstandard-direction rule.
• Removed: function-no-unknown rule.
• Removed: unit-no-unknown rule.
• Changed: string-no-newline rule option to { ignore: ['at-rule-preludes', 'declaration-values'] }].
• Added: at-rule-descriptor-no-unknown rule.
• Added: at-rule-descriptor-value-no-unknown rule.
• Added: at-rule-no-deprecated rule.
• Added: at-rule-prelude-no-invalid rule.
• Added: declaration-property-value-keyword-no-deprecated rule.
• Added: declaration-property-value-no-unknown rule.
• Added: media-feature-name-value-no-unknown rule.

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