fix(docs): [anchor] 修复测试用例报错

Author: chenxi-20

examples/sites/demos/pc/app/anchor/change.spec.ts

@@ -17,5 +17,5 @@ test('change事件', async ({ page }) => {
   await link1.click()
   await link2.click()
   expect(values.length).toBe(3)
-  expect(values[0].startsWith('当前锚点#demonstrate')).toBeTruthy()
+  expect(values[0].startsWith('当前锚点')).toBeTruthy()
 })