Remove --space from example.module.css (#428)

We don't want to encourage use of `--space-x`

Author: lukasoppermann

__tests__/__fixtures__/good/example.module.css

@@ -128,7 +128,7 @@
   width: var(--container-size);
   height: var(--container-size);
   /* stylelint-disable-next-line primer/spacing */
-  padding: var(--space-xsmall);
+  padding: var(--mySpace-xsmall);
 }
 
 .marketplace-logo--large {
@@ -149,4 +149,4 @@
   &:not([open]) .up-icon {
     display: none !important;
   }
-}
+}