Update appletsettings.md with certificate note

Add note about mixing certificate deployment mechanisms.

Author: brandonwest-netwrix

docs/accessanalyzer/11.6/admin/datacollector/fsaa/appletsettings.md

@@ -122,6 +122,7 @@ In the Certificate Exchange Options section, configure the following options:
         :::note
         If the FSAA Data Collector and the applet server are on separate domains without a
         trust, this option must be used.
+        Certificate Deployment mechanisms cannot be mixed in the same console. 
         :::