Update languages.json

Add czech

src/lib/i18n/locales/languages.json

@@ -27,6 +27,10 @@
 		"code": "ceb-PH",
 		"title": "Cebuano (Filipino)"
 	},
+	{
+		"code": "cs-CZ",
+		"title": "Czech (čeština)"
+	},
 	{
 		"code": "da-DK",
 		"title": "Danish (Denmark)"