doc/ref: clarify who maintains this document
Use Marcel's up-to-date email address,
and be clear that it's a team rather than a single person now.
Signed-off-by: Daniel Martí <mvdan@mvdan.cc>
Change-Id: I18ec6b376689c2f604b787be84006b3ea6313680
Reviewed-on: https://cue.gerrithub.io/c/cue-lang/cue/+/1232176
TryBot-Result: CUEcueckoo <cueckoo@cuelang.org>
Unity-Result: CUE porcuepine <cue.porcuepine@gmail.com>
Reviewed-by: Roger Peppe <rogpeppe@gmail.com>