chore: List background shorthand for the badge root slot

Author: vvaliyev

src/__tests__/snapshot-tests/__snapshots__/style-docs.test.ts.snap

@@ -50,7 +50,7 @@ exports[`Style API docs definition for badge matches the snapshot: badge 1`] = `
       "name": "root",
       "properties": [
         "color",
-        "background-color",
+        "background",
         "border",
         "border-radius",
         "padding",

src/badge/styles.scss

@@ -9,7 +9,7 @@
 
 @include style-api.docs(
   'root',
-  $properties: (color, background-color, border, border-radius, padding, font-family, font-size, font-weight)
+  $properties: (color, background, border, border-radius, padding, font-family, font-size, font-weight)
 );
 
 .badge {