DOC: update scipy-sphinx-theme (#12392)
DOC: update scipy-sphinx-theme (#12392)

Fixes search functionality in recent sphinx versions
WarrenWeckesser/scipy,perimosocordiae/scipy,WarrenWeckesser/scipy,matthew-brett/scipy,andyfaff/scipy,mdhaber/scipy,ilayn/scipy,Stefan-Endres/scipy,matthew-brett/scipy,endolith/scipy,WarrenWeckesser/scipy,mdhaber/scipy,zerothi/scipy,grlee77/scipy,Eric89GXL/scipy,perimosocordiae/scipy,vigna/scipy,grlee77/scipy,zerothi/scipy,e-q/scipy,scipy/scipy,rgommers/scipy,scipy/scipy,Stefan-Endres/scipy,andyfaff/scipy,Eric89GXL/scipy,WarrenWeckesser/scipy,ilayn/scipy,anntzer/scipy,ilayn/scipy,tylerjereddy/scipy,scipy/scipy,Stefan-Endres/scipy,endolith/scipy,perimosocordiae/scipy,Eric89GXL/scipy,anntzer/scipy,rgommers/scipy,matthew-brett/scipy,endolith/scipy,anntzer/scipy,e-q/scipy,nmayorov/scipy,zerothi/scipy,Stefan-Endres/scipy,rgommers/scipy,perimosocordiae/scipy,vigna/scipy,e-q/scipy,endolith/scipy,WarrenWeckesser/scipy,grlee77/scipy,nmayorov/scipy,ilayn/scipy,scipy/scipy,andyfaff/scipy,e-q/scipy,Stefan-Endres/scipy,andyfaff/scipy,e-q/scipy,tylerjereddy/scipy,andyfaff/scipy,anntzer/scipy,zerothi/scipy,grlee77/scipy,ilayn/scipy,perimosocordiae/scipy,tylerjereddy/scipy,nmayorov/scipy,scipy/scipy,tylerjereddy/scipy,endolith/scipy,vigna/scipy,Eric89GXL/scipy,zerothi/scipy,vigna/scipy,zerothi/scipy,mdhaber/scipy,matthew-brett/scipy,anntzer/scipy,scipy/scipy,nmayorov/scipy,matthew-brett/scipy,nmayorov/scipy,Stefan-Endres/scipy,WarrenWeckesser/scipy,tylerjereddy/scipy,Eric89GXL/scipy,Eric89GXL/scipy,endolith/scipy,mdhaber/scipy,vigna/scipy,rgommers/scipy,mdhaber/scipy,ilayn/scipy,rgommers/scipy,anntzer/scipy,andyfaff/scipy,mdhaber/scipy,grlee77/scipy,perimosocordiae/scipy