add workaround for flaky tests

Author: mizdra

packages/codegen/src/runner.test.ts

@@ -249,6 +249,9 @@ describe('runCMKInWatchMode', () => {
       expect(await iff.readFile('generated/src/b.module.css.d.ts')).contain('b_1');
     });
 
+    // Workaround for https://github.com/paulmillr/chokidar/issues/1399
+    await sleep(100);
+
     // Change a file
     await writeFile(iff.join('src/b.module.css'), '.b_2 {');
     await vi.waitFor(async () => {