Varia: Version bump varia package file.

varia/package.json

@@ -1,6 +1,6 @@
 {
   "name": "varia",
-  "version": "1.2.3",
+  "version": "1.2.4",
   "description": "A variable-based design system for WordPress sites built with Gutenberg.",
   "bugs": {
     "url": "https://github.com/Automattic/themes/issues?q=is%3Aopen+is%3Aissue+label%3Avaria"