This commit amends the Fedora Council Charter in the following ways:
Responsibilities: Add note about Executive Sponsor role and that a Fedora Council member is expected to become a Sponsor as a part of their term on the Council.
Community Initiative Leads: Clarify the role amid recent changes to Community Initiatives, especially around the composition of the seat and the fact that Initiatives are not hand-appointed by the Council, but actually driven by community consensus and momentum.
This commit amends the Fedora Council Charter in the following ways:
Closes Fedora-Council/tickets#412.