fix: modify the address jump url of 'User Manual'.

Created by: 123liubao

Signed-off-by: 123liubao chenly_61@163.com

What type of PR is this?

/kind bug

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #2595 (closed)

Special notes for reviewers:

Does this PR introduced a user-facing change?

None

Additional documentation, usage docs, etc.: