fix: remove experimental tag from chat command center configuration (microsoft#232010)

Author: bpasero

src/vs/workbench/contrib/chat/browser/chat.contribution.ts

@@ -112,7 +112,7 @@ configurationRegistry.registerConfiguration({
 		},
 		'chat.commandCenter.enabled': {
 			type: 'boolean',
-			tags: ['experimental', 'onExP'],
+			tags: ['preview'],
 			markdownDescription: nls.localize('chat.commandCenter.enabled', "Controls whether the command center shows a menu for chat actions (requires {0}).", '`#window.commandCenter#`'),
 			default: true
 		},