fix bazel registry branch reference

platform/external/bazelbuild-bazel-central-registry by now has a valid
`main` branch and hence we can fix this little inconsistency of having a
main-kernel branch where main would be absolutely fine.

Change-Id: I53ec8072c2d1c86c248dd24906ca00828e1a7476
Signed-off-by: Matthias Maennich <maennich@google.com>
1 file changed
tree: b400346e8697fb86a1136690a60cc5eb617d4051
  1. default.xml