[clang-tools-extra] [clang-tools-extra] Update Maintainers for Clang-Doc (PR #175822)

[Paul Kirth via cfe-commits]

ilovepi wrote:

Not sure if this requires any kind of RFC, but @evelez7 is IMO more than qualified to be listed as a maintainer, given that he's rewritten a significant portion of clang-doc over the last 9 months, and is still actively developing it.

https://github.com/llvm/llvm-project/pull/175822