fix typo

[discdiver]

Reference Issue

What does this implement/fix? Explain your changes.

Any other comments?

[codecov]

Codecov Report

Merging #829 (d3494de) into master (d9a61aa) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #829      +/-   ##
==========================================
- Coverage   98.71%   98.69%   -0.02%     
==========================================
  Files          93       93              
  Lines        6063     6063              
  Branches      508      508              
==========================================
- Hits         5985     5984       -1     
- Misses         77       78       +1     
  Partials        1        1              

Impacted Files	Coverage Δ
imblearn/datasets/tests/test_zenodo.py	89.18% <0.00%> (-2.71%)	⬇️

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[glemaitre]

Thanks