Update user lists for IBM platform teams

[miladfarca]

The user list in these groups may need to be updated. Do the listed users still need to be included?

• https://github.com/orgs/nodejs/teams/platform-ppc
  • AshCripps
• https://github.com/orgs/nodejs/teams/platform-s390
  • Ash Cripps
• https://github.com/orgs/nodejs/teams/platform-aix
  • Michael Felt, Ash Cripps
• https://github.com/orgs/nodejs/teams/platform-ibmi
  • mgoffmn, Vasili Skurydzin

[miladfarca]

FYI @richardlau

[sxa]

I'll tag Michael @aixtools explicitly - I don't think he's keeping involved any more sadly, but if he is he can respond to this issue. Ash hasn't been working with us for a while as far as I'm aware so I suspect he should be removed. I've just noticed I'm not in the ppc team though so perhaps I should get myself added (I'm in s390x and aix)

[richardlau]

Updated the teams as requested.