🧇 Update reprompt param for testing field trial config

Bug: 621875261
Change-Id: I5f1fbb14927b3cdbc67f0e19cefad27e8a964aa9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5426203


Auto-Submit: Nicolas Dossou-Gbété <dgn@chromium.org>
Commit-Queue: Alex Ilin <alexilin@chromium.org>
Commit-Queue: Nicolas Dossou-Gbété <dgn@chromium.org>
Reviewed-by: Alex Ilin <alexilin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1283172}