Change string for update required screen

This CL updates the subtitle string for update required screen in
offline mode as per UI.

Bug: 1106768
Change-Id: Ieb84f4439ef3fdf93d5353da9b19fa8ba3ca2ecb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2308711Reviewed-by: Denis Kuznetsov [CET] <antrim@chromium.org>
Commit-Queue: Saurabh Nijhara <snijhara@google.com>
Cr-Commit-Position: refs/heads/master@{#790336}

chrome/app/chromeos_strings.grdp

@@ -2824,7 +2824,7 @@
     Use metered connection
   </message>
   <message name="IDS_UPDATE_REQUIRED_SCREEN_NO_NETWORK_MESSAGE" desc="The message on the dialog shown to the user in Chrome OS before forced update is attempted if the Chrome OS device is not connected to a network.">
-    <ph name="DOMAIN">$1<ex>example.com</ex></ph> requires you to connect to Wi-Fi now and download an update. The update will download automatically when you connect to the internet.
+    <ph name="DOMAIN">$1<ex>example.com</ex></ph> requires you to connect to Wi-Fi now and download an update.
   </message>
   <message name="IDS_UPDATE_REQUIRED_SCREEN_OPEN_NETWORK_SETTINGS" desc="Label for network configuration button on the update required dialog on the login screen to open network settings so that the user can connect to a network.">
     Open network settings

chrome/app/chromeos_strings_grdp/IDS_UPDATE_REQUIRED_SCREEN_NO_NETWORK_MESSAGE.png.sha1

+ac79ba6f1aaaf62f545c3cac72469d40bbb67016
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