Move pnpm config

Author: RobbieTheWagner

package.json

@@ -115,6 +115,11 @@
     "ember-data": ">= 4.12.0",
     "ember-source": ">= 5.0.0"
   },
+  "pnpm": {
+    "onlyBuiltDependencies": [
+      "core-js"
+    ]
+  },
   "engines": {
     "node": ">= 18"
   },