Fix wide benchmark (#476)

Author: MarcAntoineSchmidtQC

CHANGELOG.rst

@@ -14,6 +14,7 @@ Unreleased
 
 - Fixed the sign of the log likelihood of the Gaussian distribution (not used for fitting coefficients).
 - Renamed functions checking for qc.matrix compliance to refer to tabmat.
+- Fixed the wide benchmarks which had duplicated columns (categorical and numerical).
 
 2.0.1 - 2021-10-11
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