Fix the naming issue when imported from a submodule

[tpoisot]

Closes #164

[github-actions]

Documentation for this PR at https://poisotlab.github.io/SpeciesDistributionToolkit.jl/previews/PR167/

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.28 🎉

Comparison is base (ff4a23e) 54.55% compared to head (dc7faae) 54.84%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #167      +/-   ##
==========================================
+ Coverage   54.55%   54.84%   +0.28%     
==========================================
  Files          47       47              
  Lines        1514     1528      +14     
==========================================
+ Hits          826      838      +12     
- Misses        688      690       +2     

Flag	Coverage Δ
unittests	54.84% <100.00%> (+0.28%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
SimpleSDMDatasets/src/downloader.jl	83.33% <100.00%> (+6.66%)	⬆️

... and 2 files with indirect coverage changes

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[tpoisot]

Plus or minus the fact that WorldClim is really wonky, this seems to be working.