Upgrade domtrip from 1.5.1 to 1.5.2 (#12174)

Fixes blank line idempotency in addBlankLineBefore/addBlankLineAfter,
which caused duplicate blank lines on repeated mvnup runs, leading to
Spotless formatting failures.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: gnodet