updated mi/vi members and mi/vi former-members (fixed #3652)

[jessewashburn]

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Description, Screenshots and/or Screencast

fixes #3652

Raw.Githack Preview Link

• vi-team.md
• vi-former-members.md
• mi-team.md
• mi-former-members.md

[jessewashburn]

I don't have dates for when these former interns left exactly, but I'm happy to add them.