Do not encodeURI when voting.

* Apparently this isn't needed with a redirect in express under this context

Inversely applies to #200 and included in #288

Tested on dev and target test script on production when deployed is https://openuserjs.org/scripts/TimidScript/%5BTS%5D_Pixiv++

Hopefully this won't need to be backed out but it's small enough to redeploy