fix jump example utils for benchmarks

[chriscoey]

No description provided.

[codecov]

Codecov Report

Merging #789 (1e594b0) into master (5d6102c) will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #789      +/-   ##
==========================================
+ Coverage   96.77%   96.82%   +0.04%     
==========================================
  Files          54       54              
  Lines        8189     8189              
==========================================
+ Hits         7925     7929       +4     
+ Misses        264      260       -4     

Impacted Files	Coverage Δ
src/linearalgebra/dense.jl	68.05% <0.00%> (+5.55%)	⬆️

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