Use full width for showing RebaseInput table in REST API docs

All tables, except this one table, use the full width. Make this
consistent and also use full width for the RebaseInput table.

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: I0e9bdf7c50f2fb9bbea8bb73473bf57a3a5fec72
Release-Notes: skip

Documentation/rest-api-changes.txt

diff --git a/Documentation/rest-api-changes.txt b/Documentation/rest-api-changes.txt
index a9b31b0..0b4a0cb 100644
--- a/Documentation/rest-api-changes.txt
+++ b/Documentation/rest-api-changes.txt
@@ -7643,7 +7643,7 @@
 === RebaseInput
 The `RebaseInput` entity contains information for changing parent when rebasing.
 
-[options="header",width="50%",cols="1,^1,5"]
+[options="header",cols="1,^1,5"]
 |===========================
 |Field Name    ||Description
 |`base`        |optional|