go.sum: run go tidy
go.sum: run go tidy

Change-Id: I40cbefde945d92123c143eb1d7090f84758c76a7
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/4504
Reviewed-by: Marcel van Lohuizen <a22d082192f3ccf984644a4f482781f4c2d65180@golang.org>

cuelang/cue