cmd/cue: mod edit should not parse module file in strict mode

[rogpeppe]

What version of CUE are you using (cue version)?

$ cue version
 v0.0.0-20240610152000-475f692480d6

Does this issue reproduce with the latest stable release?

Yes (v0.9.0)

What did you do?]

exec cue mod edit --source=git
-- cue.mod/module.cue --
module: "test.example/foo"
language: version: "v0.9.0"

What did you expect to see?

A passing test

What did you see instead?

[stderr]
module path "test.example/foo" in $WORK/cue.mod/module.cue does not contain major version
[exit status 1]
FAIL: /tmp/x.txtar:1: unexpected command failure