Update CRD copyright text w/ new year

Change-Id: Id2407083b27e13bd81ffd1872d6e9035f9090957
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2612107
Auto-Submit: Joe Downing <joedow@chromium.org>
Commit-Queue: Jamie Walch <jamiewalch@chromium.org>
Reviewed-by: Jamie Walch <jamiewalch@chromium.org>
Cr-Commit-Position: refs/heads/master@{#840433}

remoting/resources/remoting_strings.grd

@@ -317,7 +317,7 @@
           Google LLC
         </message>
         <message name="IDS_COPYRIGHT" desc="The copyright message specified in the version information of each Chrome Remote Desktop Host executable. It should be updated every year.">
-          Copyright 2020 Google LLC. All Rights Reserved.
+          Copyright 2021 Google LLC. All Rights Reserved.
         </message>
         <message name="IDS_DISPLAY_SERVICE_NAME" desc="The name of the Windows service installed by Chrome Remote Desktop.">
           Chrome Remote Desktop Service