Fix npm provenance validation during publish (#3657)

Author: fatbattk

packages/ui-extensions/package.json

@@ -152,6 +152,11 @@
     "access": "public",
     "@shopify:registry": "https://registry.npmjs.org/"
   },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/Shopify/ui-extensions.git",
+    "directory": "packages/ui-extensions"
+  },
   "files": [
     "build",
     "src",