DOC: Minor fix to _hist_bin_fd documentation (#15839)
DOC: Minor fix to _hist_bin_fd documentation (#15839)

Co-Authored-By: Ross Barnowski <e9fb290bfd0a4406872fd6103425d9efafcfa051@berkeley.edu>>
pdebuyl/numpy,mhvk/numpy,WarrenWeckesser/numpy,pbrod/numpy,rgommers/numpy,charris/numpy,simongibbons/numpy,anntzer/numpy,madphysicist/numpy,mattip/numpy,numpy/numpy,rgommers/numpy,madphysicist/numpy,grlee77/numpy,WarrenWeckesser/numpy,grlee77/numpy,mhvk/numpy,jakirkham/numpy,abalkin/numpy,madphysicist/numpy,abalkin/numpy,pbrod/numpy,madphysicist/numpy,mattip/numpy,WarrenWeckesser/numpy,mattip/numpy,jakirkham/numpy,grlee77/numpy,charris/numpy,pbrod/numpy,madphysicist/numpy,pdebuyl/numpy,mattip/numpy,pbrod/numpy,mhvk/numpy,pbrod/numpy,charris/numpy,simongibbons/numpy,abalkin/numpy,simongibbons/numpy,rgommers/numpy,mhvk/numpy,jakirkham/numpy,jakirkham/numpy,seberg/numpy,simongibbons/numpy,anntzer/numpy,pdebuyl/numpy,pdebuyl/numpy,seberg/numpy,endolith/numpy,mhvk/numpy,numpy/numpy,charris/numpy,anntzer/numpy,endolith/numpy,jakirkham/numpy,simongibbons/numpy,WarrenWeckesser/numpy,grlee77/numpy,endolith/numpy,numpy/numpy,seberg/numpy,seberg/numpy,grlee77/numpy,anntzer/numpy,endolith/numpy,rgommers/numpy,WarrenWeckesser/numpy,numpy/numpy