[disassembler] Print code offsets as hex

Another little oversight from https://crrev.com/c/2978252: Code offsets
should be printed in hexadecimal representation, not decimal.

R=delphick@chromium.org

Change-Id: I9e30a1d5d40451e9eb2fc905756d51458acbf819
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3000964


Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75519}