Update technical charter after moving to CNCF

[terrytangyuan]

More context in #56 (comment)

LF Legal is blocking some of the transfer steps until the original charter is in the repo.
The charter is the "legal contract" that determine the rules for the project and LF Legal check changes to help project not step on landmines in the future.
The project should not delete the old charter and go back to the changed version without the approval of the Formation team.
So here is what I can propose:
Merge the PR.
Discuss with the project if the changes between the old and the new charter is what the community want.
Then I will engage with the Formation team to get the charter officially updated.