Add Greg to Docs team cross-functional meetings

What

Replace Drew Blessing with Greg Myers for Docs team cross-functional meetings Support counterpart.

Why is this change being made?

• Drew Blessing is no longer on Support team.
• Greg Myers loves docs-first approach and will gladly take vacant spot.
• The most powerful tool for ticket deflection (and avoidance) for Support team is our documentation.

Thanks to @cynthia for pointing this out.

Does this MR meet the acceptance criteria?

Conformity

• Added description to this MR explaining the reasons for the proposed change, per say-why-not-just-what