chromeos/ash/components/boca: Fix typoed arg comments

This CL fixes typoes of the form /*arg-*/ that should have been /*arg=*/
under the assumption that they were trying to name an argument.

This CL was uploaded by git cl split.

R=aprilzhou@google.com

Bug: 362092187
Change-Id: I334488b214c787c10bcd3a487e546792afb60989
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5812565
Auto-Submit: Dan McArdle <dmcardle@chromium.org>
Commit-Queue: April Zhou <aprilzhou@google.com>
Reviewed-by: April Zhou <aprilzhou@google.com>
Cr-Commit-Position: refs/heads/main@{#1346818}