docs: optimize line breaks in default objects

[ST-DDT]

Fixes the display of objects in default values.

Before

After

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See also:

• https://github.com/faker-js/faker/pull/2936/files#r1649768213

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.96%. Comparing base (d5e697d) to head (acff2a1).
Report is 1 commits behind head on next.

Additional details and impacted files

@@           Coverage Diff           @@
##             next    #3190   +/-   ##
=======================================
  Coverage   99.96%   99.96%           
=======================================
  Files        2796     2796           
  Lines      216704   216704           
  Branches      958      958           
=======================================
+ Hits       216630   216633    +3     
+ Misses         74       71    -3     

see 1 file with indirect coverage changes

[Shinigami92]

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