Upgrade codex to 1.16.0 (#802)

Upgrade codex (and codex-design-tokens) to match the current
version in Mediawiki. Upgrade includes some changes to the eventing
behaviour of the Lookup component.

Bug: T379595

package.json

@@ -43,8 +43,8 @@
 		"node": ">=16"
 	},
 	"dependencies": {
-		"@wikimedia/codex": "^1.14.0",
-		"@wikimedia/codex-design-tokens": "^1.14.0",
+		"@wikimedia/codex": "^1.16.0",
+		"@wikimedia/codex-design-tokens": "^1.16.0",
 		"@wmde/wikibase-datamodel-types": "^0.2.0",
 		"jest-environment-jsdom": "^29.7.0",
 		"vue": "3.4.27",