Inconsistent `checkTakendown` flag in `requestEmailUpdate`

requestEmailUpdate has checkTakendown, but the line right below has includeTakenDown: true, which is contradictory. We might want to set that to false.

https://github.com/bluesky-social/atproto/blob/5d3e248c262f45e3ca471d8d2381830a4cd896ae/packages/pds/src/api/com/atproto/server/requestEmailUpdate.ts#L32