Add forgotten import in example

[belanenko]

Add forgotten import in example

"github.com/genjidb/genji/types"

[codecov[bot]]

Codecov Report

Merging #484 (36ca70d) into main (05dc6c9) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #484   +/-   ##
=======================================
  Coverage   79.12%   79.12%           
=======================================
  Files         128      128           
  Lines       10782    10782           
=======================================
  Hits         8531     8531           
  Misses       1545     1545           
  Partials      706      706           

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