[clang] Nominate Saleem and myself as maintainers for API Notes (PR #114981)

[Aaron Ballman via cfe-commits]

https://github.com/AaronBallman approved this pull request.

LGTM (with a minor whitespace nit for consistency with the rest of the file), though please wait to land until after @compnerd has accepted the nomination as well.

Thank you for volunteering!

https://github.com/llvm/llvm-project/pull/114981