Use sample command instead of about

Co-authored-by: Stefan Dirix <[email protected]>

examples/api-samples/src/browser/chat/chat-node-toolbar-action-contribution.ts

@@ -29,9 +29,9 @@ export function bindChatNodeToolbarActionContribution(bind: interfaces.Bind): vo
         getToolbarActions: (args: RequestNode | ResponseNode) => {
             if (isResponseNode(args)) {
                 return [{
-                    commandId: 'core.about',
+                    commandId: 'sample-command',
                     icon: 'codicon codicon-feedback',
-                    tooltip: 'Show about dialog'
+                    tooltip: 'Example command'
                 }];
             } else {
                 return [];