DOC fix a typo in plot_comparison_under_sampling (#1044)

Author: tthost

examples/under-sampling/plot_comparison_under_sampling.py

@@ -140,7 +140,7 @@ def plot_decision_function(X, y, clf, ax, title=None):
 # selected can be specified.
 # :class:`~imblearn.under_sampling.RandomUnderSampler` is the most naive way of
 # performing such selection by randomly selecting a given number of samples by
-# the targetted class.
+# the targeted class.
 
 # %%
 from imblearn.under_sampling import RandomUnderSampler