update seed to use ts script

package.json

@@ -14,7 +14,7 @@
   ],
   "scripts": {
     "build": "medusa build",
-    "seed": "medusa exec ./dist/scripts/seed.js",
+    "seed": "medusa exec ./src/scripts/seed.ts",
     "start": "medusa start",
     "dev": "node ./develop.mjs"
   },