[kube] Fix edit-secret script.
[kube] Fix edit-secret script.

Change-Id: I5fff4dc58783507d51147c76c74fe8c96c661fcd
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/433000
Reviewed-by: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>
Commit-Queue: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot