PEP 13: Update 'Current steering council' section

[StanFromIreland]

• Change is either:
  • To a Draft PEP
  • To an Accepted or Final PEP, with Steering Council approval
  • To fix an editorial issue (markup, typo, link, header, etc)
• PR title prefixed with PEP number (e.g. PEP 123: Summary of changes)

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[hugovk]

Thanks!

[warsaw]

We really should have a checklist somewhere that we follow when the new council is seated. I think we mostly know the most important things to update (various permissions and memberships), but things like this can fall through the cracks. Thanks for the update!