text fix

Author: iankhou

packages/aws-cdk/lib/commands/flag-operations.ts

@@ -128,7 +128,7 @@ export async function handleFlags(flagData: FeatureFlag[], ioHelper: IoHelper, o
   }
 
   if (options.unconfigured && options.FLAGNAME) {
-    await ioHelper.defaults.error('Error: Cannot use --unconfigured with a specific flag name. --unconfigured works with all flags.');
+    await ioHelper.defaults.error('Error: Cannot use --unconfigured with a specific flag name. --unconfigured works with multiple flags.');
     return;
   }
 

packages/aws-cdk/test/commands/flag-operations.test.ts

@@ -649,7 +649,7 @@ describe('handleFlags', () => {
     await handleFlags(mockFlagsData, ioHelper, options, mockToolkit);
 
     const plainTextOutput = output();
-    expect(plainTextOutput).toContain('Error: Cannot use --unconfigured with a specific flag name. --unconfigured works with all flags.');
+    expect(plainTextOutput).toContain('Error: Cannot use --unconfigured with a specific flag name. --unconfigured works with multiple flags.');
   });
 
   test('shows error when setting a flag without providing a value', async () => {