💄 Ensure v4 of utrecht button is full width on mobile

The default for max-inline-size is 'fit-content', which breaks our
mobile styling.

Author: sergei-maertens

src/community/utrecht/button.tokens.json

@@ -9,6 +9,7 @@
       "font-size": {"value": "{of.text.big.font-size}"},
       "line-height": {"value": "1.333"},
       "min-block-size": {"value": "0"},
+      "max-inline-size": {"value": "100%"},
       "min-inline-size": {"value": "0"},
       "padding-block-start": {"value": "10.003px"},
       "padding-block-end": {"value": "10.003px"},