meta: clarify nomination process according to Node.js charter
Clarification on the nomination process as mentioned by @jasnell in https://github.com/nodejs/TSC/issues/1467#issuecomment-1806812659.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Clarification on the nomination process as mentioned by @jasnell in https://github.com/nodejs/TSC/issues/1467#issuecomment-1806812659.