doc/tutorial: fix typo
Closes #2389 as merged as of commit e2e4e668.
Signed-off-by: toshi0607 <s.toshi0607@gmail.com>
Change-Id: I0b1e2d938ab88789f0292319a4eecc3c0e563a4d
Reviewed-on: https://review.gerrithub.io/c/cue-lang/cue/+/553569
TryBot-Result: CUEcueckoo <cueckoo+gerrithub@cuelang.org>
Unity-Result: CUEcueckoo <cueckoo+gerrithub@cuelang.org>
Reviewed-by: Paul Jolly <paul@myitcv.io>
authored by