Report label as error not taskName

src/vs/workbench/parts/tasks/node/taskConfiguration.ts

@@ -1233,7 +1233,7 @@ namespace CustomTask {
 			taskName = external.label;
 		}
 		if (!taskName) {
-			context.problemReporter.error(nls.localize('ConfigurationParser.noTaskName', 'Error: tasks must provide a taskName property. The task will be ignored.\n{0}\n', JSON.stringify(external, null, 4)));
+			context.problemReporter.error(nls.localize('ConfigurationParser.noTaskName', 'Error: a task must provide a label property. The task will be ignored.\n{0}\n', JSON.stringify(external, null, 4)));
 			return undefined;
 		}