[bazel] Fix rules_docker error.
[bazel] Fix rules_docker error.

Bug: skia:11110
Change-Id: Ic7ef8b252bca9ba6f9483d70ba28a75dbc6c63bc
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/356956
Reviewed-by: Leandro Lovisolo <f558143c2568be8d55575d13f30a1fc5cb8009d5@google.com>
Commit-Queue: Leandro Lovisolo <f558143c2568be8d55575d13f30a1fc5cb8009d5@google.com>
Auto-Submit: Leandro Lovisolo <f558143c2568be8d55575d13f30a1fc5cb8009d5@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