fix: Didn't show the full changeset of a pipeline run.

Signed-off-by: Ryan Wang i@ryanc.cc

What type of PR is this?

/kind bug

What this PR does / why we need it:

Show the full changeset of a pipeline run.

Which issue(s) this PR fixes:

Fixes https://github.com/kubesphere/ks-devops/issues/108

Special notes for reviewers:

Does this PR introduced a user-facing change?

Fix the changeset of a Pipeline run incomplete

Additional documentation, usage docs, etc.: