Merge pull request #51181 from doubleO8/fix-occ-theming-config-background_color

include 'background_color' in list of supported keys

Author: sorbaugh

apps/theming/lib/Command/UpdateConfig.php

@@ -16,7 +16,7 @@
 
 class UpdateConfig extends Command {
 	public const SUPPORTED_KEYS = [
-		'name', 'url', 'imprintUrl', 'privacyUrl', 'slogan', 'color', 'primary_color', 'disable-user-theming'
+		'name', 'url', 'imprintUrl', 'privacyUrl', 'slogan', 'color', 'primary_color', 'background_color', 'disable-user-theming'
 	];
 
 	public function __construct(