docs: show backup command in help (#5865)

Author: rneatherway

packages/sanity/src/_internal/cli/commands/backup/backupGroup.ts

@@ -6,9 +6,8 @@ export const defaultApiVersion = 'v2024-02-21'
 const datasetBackupGroup: CliCommandGroupDefinition = {
   name: 'backup',
   signature: '[COMMAND]',
-  description: 'Manage dataset backups.',
+  description: 'Manage backups.',
   isGroupRoot: true,
-  hideFromHelp: true,
 }
 
 export default datasetBackupGroup