Add contact for maintainers that is not Intel specific

[rodburns]

The contact for the project is an Intel domain email address. In the interest of the project being openly governed use an alternative communication channel. This could be a mailing list or dedicated UXL email address. Contact operations@uxlfoundation.org to set up an email address

[vbm23]

@pavelkumbrasev Did you manage to contact operations@uxlfoundation.org to set up an email address as an an alternative communication channel or dedicated UXL email address in interest of project being openly governed ?

[pavelkumbrasev]

Hi @vbm23, sorry I have not contacted operations@uxlfoundation.org yet

[vbm23]

@pavelkumbrasev No worries, based on your convivence you can take some time to do that as we still have a month more to go when it gets due

[pavelkumbrasev]

Team agreed to remove email list from the README because public communication channels are defined in the project README. https://github.com/oneapi-src/oneTBB/pull/1509

[vbm23]

https://github.com/oneapi-src/oneTBB/pull/1509 Merged