fix: added missing comma from golden.json (#426)

Author: Matt Goo

test/screenshot/golden.json

@@ -8,7 +8,7 @@
   "icon-button": "5ffb1f7fbd06d2c0533f6ba8d4d9ea170cec1a248a61de1cc1bb626cb58ebcd2",
   "layout-grid": "fe40f7a34853bc2a1d9a836e812599d4d47b5b26b839a8eaed7f98ea91946790",
   "line-ripple": "56b136db2dc7e09260849447e6bde9b55a837af332a05d9f52506ab1c95e2e57",
-  "list": "2d98c951d42a2e724d57083159aebdc34848bbd3fa2c264c8595ea0982cc1a99",
+  "list": "a53f22639b6eae05613ffd0bb943ede1e7edba4a50d28463389a00828896a644",
   "material-icon": "442b39fb22d2c7a74efb23ca098429b471501ce21df8662327bbf9871fe0bcb0",
   "menu-surface": "f5face1a24fe166e86e8a3dc35ea85b2d4431469a3d06bf6fc1a30fbdc175aff",
   "notched-outline": "7770dd381c27608a1f43b6f83da92507fe53963f5e4409bd73184b86275538fe",
@@ -32,7 +32,7 @@
   "top-app-bar/standardNoActionItems": "6d361edb994cafcc6ac720336d12ee7d7114745993e16abd6e6b00f078424ff2",
   "top-app-bar/standardWithNavigationIconElement": "95afd559c35dede805e4d4b51ad1fabd82b4117c358a8679e3166b88e059bf68",
   "drawer/permanentBelowTopAppBar": "587ee2605c4b3e3f0408c6130b824b58587e05cedf9b964e14fc481b9de1e4c2",
-  "drawer/dismissibleBelowTopAppBar": "a9bf24c0edd3dcc9167516ce3bdd146fd1a352c4f5b9ea76a1f9dad1ba61e0f8"
+  "drawer/dismissibleBelowTopAppBar": "a9bf24c0edd3dcc9167516ce3bdd146fd1a352c4f5b9ea76a1f9dad1ba61e0f8",
   "drawer/permanent": "6355905c2241b5e6fdddc2e25119a1cc3b062577375a88b59e6750c4b76e4561",
   "drawer/dismissible": "6ea0638441e0e6df3c97028136239498a31bba206253a01d114431eda20d1060",
   "drawer/modal": "11d4ad79b8c4e672952cbb5dc3f7deb810e17fad00dc29ba7cba81b0aacb72fa",