doc: revise Collaborator description in GOVERNANCE.md
- Active voice
- Remove Node.js Foundation mention. It may be appropriate to add something back in when the new foundation is bootstrapped. We don't control membership criteria, so best to link to something else when it becomes available rather than make guarantees in this doc.
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
documentation is changed or added -
commit message follows commit guidelines