doc: remove duplicate command from Kubernetes tutorial
doc: remove duplicate command from Kubernetes tutorial

cue get go k8s.io/api/apps/v1 was listed twice

Change-Id: If7b7994d88c34a177a2ebff18cef38e33f5d03e4
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/8233
Reviewed-by: Marcel van Lohuizen <a22d082192f3ccf984644a4f482781f4c2d65180@golang.org>
Reviewed-by: CUE cueckoo <0f32a827c9a5f00281f936ac78b5ef3ba80a954c@gmail.com>

cuelang/cue