[CrOS Settings] Fix incorrectly formatted search input in narrow mode.

Before: https://screenshot.googleplex.com/2ougwchZvqU
After: https://screenshot.googleplex.com/Xq9nNPQQaQA

Fixed: 1081984
Change-Id: Ie7124973ade76e81f8a1559ca28e335347034a7e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2200417Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Regan Hsu <hsuregan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#768929}

chrome/browser/resources/settings/chromeos/os_settings_ui/os_settings_ui.js

@@ -109,7 +109,7 @@ cr.define('settings', function() {
        */
       narrowThreshold_: {
         type: Number,
-        value: 900,
+        value: 980,
       },
     },