header-checker: Reformat README.md for Gitiles

Test: n/a

Bug: 64267858

Merged-In: If98233bb6607458d56dc2804e0c761597372925e
Change-Id: If98233bb6607458d56dc2804e0c761597372925e
(cherry picked from commit deea0ca9701fff9dd29e86653b532bb452fa1fe8)
1 file changed