DOC Fix typo in docstring for Pipeline __getitem__ method (#20523)
DOC Fix typo in docstring for Pipeline __getitem__ method (#20523)

Co-authored-by: bumblebebee211196 <1592f15c60ee0ffa16edc22d6ae1f046b81f842a@gmail.com>
ivannz/scikit-learn,saiwing-yeung/scikit-learn,AlexandreAbraham/scikit-learn,shyamalschandra/scikit-learn,lesteve/scikit-learn,manhhomienbienthuy/scikit-learn,huzq/scikit-learn,shyamalschandra/scikit-learn,anntzer/scikit-learn,manhhomienbienthuy/scikit-learn,espg/scikit-learn,manhhomienbienthuy/scikit-learn,shyamalschandra/scikit-learn,AlexandreAbraham/scikit-learn,lesteve/scikit-learn,vinayak-mehta/scikit-learn,jakirkham/scikit-learn,sergeyf/scikit-learn,TomDLT/scikit-learn,scikit-learn/scikit-learn,TomDLT/scikit-learn,vinayak-mehta/scikit-learn,betatim/scikit-learn,espg/scikit-learn,saiwing-yeung/scikit-learn,vinayak-mehta/scikit-learn,betatim/scikit-learn,huzq/scikit-learn,betatim/scikit-learn,betatim/scikit-learn,AlexandreAbraham/scikit-learn,TomDLT/scikit-learn,sergeyf/scikit-learn,lesteve/scikit-learn,scikit-learn/scikit-learn,anntzer/scikit-learn,espg/scikit-learn,huzq/scikit-learn,sergeyf/scikit-learn,shyamalschandra/scikit-learn,anntzer/scikit-learn,ivannz/scikit-learn,AlexandreAbraham/scikit-learn,TomDLT/scikit-learn,vinayak-mehta/scikit-learn,saiwing-yeung/scikit-learn,scikit-learn/scikit-learn,scikit-learn/scikit-learn,manhhomienbienthuy/scikit-learn,lesteve/scikit-learn,espg/scikit-learn,ivannz/scikit-learn,jakirkham/scikit-learn,sergeyf/scikit-learn,saiwing-yeung/scikit-learn,huzq/scikit-learn,ivannz/scikit-learn,anntzer/scikit-learn,jakirkham/scikit-learn,jakirkham/scikit-learn