fix(@clayui/css): Mixins clay-range-input-variant should accept new k…

…ey value pattern for clay-range-thumb

    - The new key/value pattern is form-control-range: (hover: (), focus: (), disabled: ())
    - The old pattern is still accepted focus: (clay-range-thumb: ())

packages/clay-css/src/scss/mixins/_forms.scss

@@ -2300,6 +2300,10 @@
 			map-deep-get($map, focus, clay-range-thumb),
 			()
 		);
+		$focus-clay-range-thumb: map-merge(
+			setter(map-get($focus, clay-range-thumb), ()),
+			$focus-clay-range-thumb
+		);
 		$focus-clay-range-thumb: map-merge(
 			$focus-clay-range-thumb,
 			(