[doc] 404 error in pulsar io-use

[huangdx0726]

Describe the bug
404 error in pulsar io-use.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'http://pulsar.apache.org/docs/en/io-use'
2. Click on 'Use'
3. Scroll down to 'reload'
   4.Click here link
4. See error

Expected behavior
Right page is displayed.

Screenshots

.

Desktop (please complete the following information):

• OS: [e.g. iOS]

Additional context
Add any other context about the problem here.

[sijie]

This is related to #6110

[sijie]

This was fixed by #6125