fix(language-client): correct DocumentFormattingRegistrationOptions

[fannheyward]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.00%. Comparing base (b06ec93) to head (d57a424).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5481      +/-   ##
==========================================
+ Coverage   97.97%   98.00%   +0.02%     
==========================================
  Files         280      280              
  Lines       27867    27867              
  Branches     5769     5769              
==========================================
+ Hits        27304    27310       +6     
+ Misses        104      101       -3     
+ Partials      459      456       -3     

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