Sprinkles: Fix responsiveArray length of 4 (#210)

Author: markdalgleish

.changeset/rare-rings-applaud.md

@@ -0,0 +1,5 @@
+---
+'@vanilla-extract/sprinkles': patch
+---
+
+Fix bug where `responsiveArray` with a length of 4 was considered invalid

packages/sprinkles/src/types.ts

@@ -11,7 +11,7 @@ interface RequiredResponsiveArray<Length extends number, Value>
 }
 
 export type ResponsiveArrayConfig<Value> = ResponsiveArray<
-  2 | 3 | 5 | 6 | 7 | 8,
+  2 | 3 | 4 | 5 | 6 | 7 | 8,
   Value
 >;