Disallow PSF staff from serving on the packaging council

There is a potential CoI around direct control over the funding that
they would have approval power on.

Author: pradyunsg

peps/pep-0772.rst

@@ -246,14 +246,16 @@ Conflicts of interest
 No more than two Packaging Council members should be employed by or
 significantly affiliated with the same entity. An entity would be a company, a
 company and its subsidiaries, or another incorporated entity such as a
-non-profit or educational institution with its own mission and goals.  PSF
-members are explicitly exempt from this restriction, but _not_ PSF employees,
-directors, or officers.
+non-profit or educational institution with its own mission and goals. PSF
+members are explicitly exempt from this restriction, but _not_ PSF directors,
+or officers.
 
 While we trust council members to act in the best interests of Python rather
 than themselves or their employers, the mere appearance of any one company
 dominating Python development could itself be harmful and erode trust.
 
+PSF staff members are not permitted to be on the Packaging Council.
+
 In a council election, if more than two of the top five vote-getters work for
 the same employer, then whichever of them ranked lowest is disqualified and the
 6th-ranking candidate moves up into 5th place; this is repeated until a valid