bump hoon root to %k.138

[drbeefsupreme]

Not sure if there was a particular reason this hadn't been updated, or if nobody had gotten around to doing it yet.

I've confirmed that Nockchain runs fine with this. However, test_sivb_en fails. It currently passes on the status branch.

test jets::lock::aes::tests::test_siva_de ... ok
test jets::lock::aes::tests::test_siva_en ... ok
test jets::lock::aes::tests::test_sivb_de ... ok
memory allocation of test jets::lock::aes::tests::test_sivb_en ... 24ok bytes failed

I spent a few minutes looking into this but nothing popped out at me.

[drbeefsupreme]

Hmmm, the test passed on CI. I wonder what's causing it to fail on my machine?

[eamsden]

Rather than mutating, this should be copied, or perhaps we should write a const function that takes the kelvin root.