DOC: update version switcher for 1.9.3 (#17264)
DOC: update version switcher for 1.9.3 (#17264)


anntzer/scipy,scipy/scipy,ilayn/scipy,anntzer/scipy,ilayn/scipy,ilayn/scipy,Stefan-Endres/scipy,anntzer/scipy,scipy/scipy,ilayn/scipy,anntzer/scipy,anntzer/scipy,WarrenWeckesser/scipy,anntzer/scipy,WarrenWeckesser/scipy,scipy/scipy,ilayn/scipy,andyfaff/scipy,andyfaff/scipy,andyfaff/scipy,scipy/scipy,andyfaff/scipy,WarrenWeckesser/scipy,WarrenWeckesser/scipy,scipy/scipy,scipy/scipy,WarrenWeckesser/scipy,Stefan-Endres/scipy,andyfaff/scipy,WarrenWeckesser/scipy,ilayn/scipy,Stefan-Endres/scipy,Stefan-Endres/scipy,Stefan-Endres/scipy,andyfaff/scipy,Stefan-Endres/scipy