Bump @primer/primitives from 11.7.1 to 11.9.0 in /demo (#4074)

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demo/package-lock.json

@@ -4,7 +4,7 @@
   "version": "0.1.0",
   "dependencies": {
     "@primer/css": "^22.1.1",
-    "@primer/primitives": "^11.7.1",
+    "@primer/primitives": "^11.9.0",
     "@rails/actioncable": "^8.1.300",
     "@rails/ujs": "^7.1.600",
     "turbolinks": "^5.2.0"