fix map

Author: nconsigny

.github/ACDbot/meeting_topic_mapping.json

@@ -1117,7 +1117,7 @@
         "issue_number": 1578,
         "issue_title": "Portal Implementers Call | call #57 | June 20, 2025",
         "discourse_topic_id": "24583",
-        "start_time": "2025-06-20T16:30:00Z",
+        "start_time": "2025-06-20T12:30:00Z",
         "duration": 30,
         "skip_youtube_upload": true,
         "Youtube_upload_processed": false,