Document Scala Steward usage on Github site

[clairemcginty]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.30%. Comparing base (d0a572d) to head (55eaf37).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5639   +/-   ##
=======================================
  Coverage   61.30%   61.30%           
=======================================
  Files         314      314           
  Lines       11274    11274           
  Branches      814      814           
=======================================
  Hits         6912     6912           
  Misses       4362     4362           

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