Change the requirements for the chair of the topic selection committee

Current language:

Article IV. TOPIC SELECTION
Section 6:

"The chair of the Topic Selection Committee will be a committee member selected by a majority vote of the committee."

Proposed language:

"The chair of the Topic Selection Committee may be a committee member selected by a majority vote of the committee. The committee may also elect a non-voting chair from outside their membership."

Rationale:

To give the topic committee the choice to select an outside member as their chair.