[DOCFIX] Update distributeLoad doc
[DOCFIX] Update distributeLoad doc

### What changes are proposed in this pull request?

Update `distributedLoad` doc

### Why are the changes needed?

Some options are missing in doc

### Does this PR introduce any user facing changes?

No

pr-link: Alluxio/alluxio#13659
change-id: cid-1740c31ba6ac0f77eed6f8a85e969351a93e5aea
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