Document declaration-property-value-no-unknown syntax reference (#8193

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stylelint · Dec 14, 2024 · dc84af3 · dc84af3
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diff --git a/lib/rules/declaration-property-value-no-unknown/README.md b/lib/rules/declaration-property-value-no-unknown/README.md
@@ -11,6 +11,8 @@ a { top: unknown; }
 
 This rule considers values for properties defined within the CSS specifications to be known. You can use the `propertiesSyntax` and `typesSyntax` secondary options to extend the syntax.
 
+You can filter the [CSSTree Syntax Reference](https://csstree.github.io/docs/syntax/) to find out what value syntax is known for a property.
+
 This rule is only appropriate for CSS. You should not turn it on for CSS-like languages, such as Sass or Less, as they have their own syntaxes.
 
 This rule is experimental with some false negatives that we'll patch in minor releases.