chore: update main package README (#3840)

* chore: update main package README

* change linking from master to develop

packages/medusa/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@medusajs/medusa",
   "version": "1.8.2",
-  "description": "E-commerce for JAMstack",
+  "description": "Building blocks for digital commerce",
   "main": "dist/index.js",
   "bin": "./cli.js",
   "repository": {