Moving some users to be outside collaborators

[BigLep]

These users were listed as organizational members but they're not part of a team or any repo. As a result, they should be 100% safe to move as outside collaborators in the organization. I will do that in the UI, since there isn't a way to do this through github-mgmt currently. I'm doing this to free up membership seats for folks who do need to be members so they can access private repos.

@TheMenko
@YuliiaFilecoin
@mb1896
@porcuquine
@smagdali

[github-actions]

The following access changes will be introduced as a result of applying the plan:

Access Changes

User mb1896:
  - will leave the organization
User porcuquine:
  - will leave the organization
User smagdali:
  - will leave the organization
User themenko:
  - will leave the organization
User yuliiafilecoin:
  - will leave the organization

[BigLep]

The folks above were converted to outside collaborators. I'll close this PR as github-mgmt state will update during the next sync job.