Superset Dashboard: fix pre-commit issues.

[klbtheprogrammer]

No description provided.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 28.90%. Comparing base (f82a82e) to head (7d77086).
Report is 6 commits behind head on 17.0-1.2.

Additional details and impacted files

@@            Coverage Diff            @@
##           17.0-1.2      #13   +/-   ##
=========================================
  Coverage     28.90%   28.90%           
=========================================
  Files             9        9           
  Lines           384      384           
  Branches         71       71           
=========================================
  Hits            111      111           
  Misses          273      273           

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