Replace INP Changelog Placeholder

Change-Id: Ife39c3f110856239ec60b31d69a6ebdc235a9aa9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5608533


Reviewed-by: Ian Clelland <iclelland@chromium.org>
Commit-Queue: Aoyuan Zuo <zuoaoyuan@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1312181}