fix typo

[laborg]

No description provided.

[codecov]

Codecov Report

Merging #594 into master will increase coverage by 0.14%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #594      +/-   ##
==========================================
+ Coverage   95.01%   95.16%   +0.14%     
==========================================
  Files          33       33              
  Lines        2831     2831              
==========================================
+ Hits         2690     2694       +4     
+ Misses        141      137       -4

Impacted Files	Coverage Δ
src/robin_dict.jl	99.14% <0%> (+1.71%)	⬆️

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[oxinabox]

thanks