message: ci: update pullapprove config
  Update the fallback group in pullapprove to define a reviewer for the group,
  in preparation for the upcoming change to how pullapprove billing works. The
  new billing will work on a seats based approach rather than flat usage.
  PR Close
diff: @@ -1336,3 +1336,17 @@ groups:
  # ensure that no explicit global approval has been provided.
  - *can-be-global-approved
  - *can-be-global-docs-approved
  + # PullApprove uses a combination of users defined in the pullapprove configuration and the
  + # number of users who have performed reviews on Github in the recent past if the configuration
  + # does not specify it. Because, as an open source project, anyone on Github can perform a
  + # review we need to ensure that all groups, including the fallback group, have at least one user
  + # or group defined as reviewers.
  + reviewers:
  + users:
  + - josephperrott
  + reviews:
  + request: 0
  + required: 1
  + # Reviewed-for is required on fallback as it should not ever actually be reviewed, requiring
  + # Reviewed-for helps insure an accidental approval doesn't occur on the fallback group.
  + reviewed_for: required
  