Fix caption line break in OverrideSecurityRestrictionsOnInsecureOrigin

In this CL we also fix the yaml style of
OverrideSecurityRestrictionsOnInsecureOrigin and
UnsafelyTreatInsecureOriginAsSecure

Fixed: 1508920
Change-Id: I6518e50ece1938128786b4043d6c99de9c287e74
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5115701
Reviewed-by: Maksim Ivanov <emaxx@chromium.org>
Commit-Queue: Maksim Ivanov <emaxx@chromium.org>
Auto-Submit: Yann Dago <ydago@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1237031}