Add note about the tagging bot to area-owners.md (#39750)

Follow-up to #39659

Co-authored-by: Dan Moseley <[email protected]>

Author: akoeplinger

docs/area-owners.md

@@ -1,4 +1,6 @@
-If you need to tag folks on an issue or PR, you will generally want to tag the owners (not the lead)
+If you need to tag folks on an issue or PR, you will generally want to tag the owners (not the lead).
+
+Note: Editing this file doesn't update the mapping used by the `@msftbot` issue notification bot to tag owners. Some area owners prefer not to get those notifications. To update those notifications, contact any one of `@danmosemsft`, `@jeffschw`, `@ericstj`, or `@karelz`. If you're a community member interested in these notifications, you won't appear in this table but we can add you to notifications - just let us know.
 
 | Area                                           | Lead          | Owners (area experts to tag in PR's and issues)     | Description                                                                                                                                                                                                                                                                               |
 |------------------------------------------------|---------------|-----------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|