doc: add cjihrig alternative GPG ID
doc: add cjihrig alternative GPG ID

The v1.10.0 release was signed with this key by mistake.

Fixes: https://github.com/libuv/libuv/issues/1140
PR-URL: https://github.com/libuv/libuv/pull/1141
Reviewed-By: Ben Noordhuis <59bd0a3ff43b32849b319e645d4798d8a5d1e889@bnoordhuis.nl>

unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso