Update city name in metadata.json for PCD Denver 2026

Author: SableRaf

pcd-website/src/content/events/pcd-denver-2026/metadata.json

@@ -23,7 +23,7 @@
   "event_activities": [],
   "event_page_url": "",
   "forum_thread_url": "https://discourse.processing.org/t/pcd-denver-2026/48143",
-  "city": "Denver, Colorado",
+  "city": "Denver",
   "country": "United States",
   "placeholder": false,
   "intake": {