Update polaris-tokens/src/token-groups/space.ts

Co-authored-by: Aaron Casanova <32409546+aaronccasanova@users.noreply.github.com>

Author: kyledurand

polaris-tokens/src/token-groups/space.ts

@@ -19,7 +19,7 @@ export type SpaceScale =
   | '28'
   | '32';
 
-export type SpaceExperimentalScale = '1_5';
+type SpaceExperimentalScale = '1_5';
 
 export type SpaceTokenName =
   | `space-${SpaceScale}`