encoding/jsonschema: respect Config.PkgName
This restores the `Config.PkgName` functionality broken by previous
updates.
Signed-off-by: Roger Peppe <rogpeppe@gmail.com>
Change-Id: I135df49c58f7ac88cdcf47563bbd31c8e20c7ab2
Reviewed-on: https://review.gerrithub.io/c/cue-lang/cue/+/1205904
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Unity-Result: CUE porcuepine <cue.porcuepine@gmail.com>
TryBot-Result: CUEcueckoo <cueckoo@cuelang.org>