Fix: Add type to DocBlock

[localheinz]

This PR

• adds a missing type to a DocBlock

[codecov]

Codecov Report

Merging #269 into main will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #269   +/-   ##
=========================================
  Coverage     97.59%   97.59%           
  Complexity       98       98           
=========================================
  Files            21       21           
  Lines           249      249           
=========================================
  Hits            243      243           
  Misses            6        6           

Impacted Files	Coverage Δ	Complexity Δ
src/FixtureFactory.php	96.36% <ø> (ø)	42.00 <0.00> (ø)

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