Update policy notes (#46834)

Companion to MicrosoftDocs/Contribute#1129

Author: BillWagner

admin/governance.md

@@ -61,4 +61,4 @@ You can see the full details on configured GitHub actions in our [README.MD](htt
 We're assigning values to the following additional properties using the new GitHub project system.
 
 - *Size*: The relative size of work required.
-- *Priority*: The relative priority of this issue. This should map to the `Pri?` labels.
+- *Priority*: The relative priority of this issue.