add itslychee to voters.json

[nix-elections[bot]]

Automerged because this PR only changes the PR authors voters.json entry

[itslychee]

I don't think i shouldve done this, i'll revert.

[infinisil]

Whoops, I'll look into how this was automerged, it shouldn't have been!

Edit: Turns out anybody in the org can interact with this repo, so I've now implemented additional checks