Update editor.lineNumbers description

src/vs/editor/common/config/commonEditorConfig.ts

@@ -211,7 +211,7 @@ const editorConfiguration: IConfigurationNode = {
 				nls.localize('lineNumbers.interval', "Line numbers are rendered every 10 lines.")
 			],
 			'default': 'on',
-			'description': nls.localize('lineNumbers', "Controls the display of line numbers. Possible values are 'on', 'off', and 'relative'.")
+			'description': nls.localize('lineNumbers', "Controls the display of line numbers. Possible values are 'on', 'off', 'relative' and 'interval'.")
 		},
 		'editor.rulers': {
 			'type': 'array',