fix: docs in pipeline page 404 not found

Created by: PrajwalBorkar

Signed-off-by: Prajwal Borkar prajwalborkar5075@gmail.com

What type of PR is this?

/kind documentation

What this PR does / why we need it:

The documentation in the Pipelines page is not found.

Which issue(s) this PR fixes:

Fixes #https://github.com/kubesphere/ks-devops/issues/721

Special notes for reviewers:

Does this PR introduced a user-facing change?

fix: docs in pipeline page 404 not found 

Additional documentation, usage docs, etc.:

None