[TF-M] New TF-M maintainer

Hi Everyone,

I am glad to announce the new maintainer of TF-M project:

* Antonio de Angelis aka adeaarm Antonio.deAngelis@arm.com>mailto:Antonio.deAngelis@arm.com%3e%60

Antonio was with TF-M from the very beginning being one of the project founders. Thank you, Antonio, for agreeing to maintain the project.

All the best, Anton