Change PERSON_API_KEY_VALUE for mail archive lookups

Change /api/v2/person/person to ROBOT to prepare for 
switching from personal api key to robot, mail-archive
api key. Once in place, generate new key for this 
endpoint and install.
 - Legacy-Id: 19035

Author: rpcross

ietf/person/models.py

@@ -348,7 +348,7 @@ def salt():
 # Manual maintenance: List all endpoints that use @require_api_key here
 PERSON_API_KEY_VALUES = [
     ("/api/iesg/position", "/api/iesg/position", "Area Director"),
-    ("/api/v2/person/person", "/api/v2/person/person", "Secretariat"),
+    ("/api/v2/person/person", "/api/v2/person/person", "Robot"),
     ("/api/meeting/session/video/url", "/api/meeting/session/video/url", "Recording Manager"),
     ("/api/notify/meeting/registration", "/api/notify/meeting/registration", "Robot"), 
     ("/api/notify/meeting/bluesheet", "/api/notify/meeting/bluesheet", "Recording Manager"),