docs: correct docstring for DefaultEngine::new

[gotocoding-DB]

What changes are proposed in this pull request?

In #699 table_root was removed from params, just fix the docs after this change.

How was this change tested?

[gotocoding-DB]

@roeap please check this. I don't have enough access to add you to reviewers in this PR.

[roeap]

Thanks for fixing this @gotocoding-DB!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.01%. Comparing base (929ac08) to head (1927f85).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #821      +/-   ##
==========================================
- Coverage   85.03%   85.01%   -0.02%     
==========================================
  Files          84       84              
  Lines       20656    20656              
  Branches    20656    20656              
==========================================
- Hits        17565    17561       -4     
- Misses       2226     2228       +2     
- Partials      865      867       +2     

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[zachschuermann]

LGTM thanks :)