terraform/github: Invite cinerea0 to pkg-committers

[the-maldridge]

@cinerea0 welcome aboard. Please signify your acceptance in this PR thread.

@void-linux/void-ops for approval:

  # github_team_membership.team_membership["pkg-committers_cinerea0"] will be created
  + resource "github_team_membership" "team_membership" {
      + etag     = (known after apply)
      + id       = (known after apply)
      + role     = "member"
      + team_id  = "2795568"
      + username = "cinerea0"
    }

[cinerea0]

I accept!