DOC: scipy.stats: fix documentation issues of multivariate distributions (#13103)
DOC: scipy.stats: fix documentation issues of multivariate distributions (#13103)

* DOC: scipy.stats: fix documentation issues of multivariate distributions.

Co-authored-by: Matt Haberland <1f6e3f9dd4f3b851e1c9f994a33220fb712394f1@calpoly.edu>
ilayn/scipy,mdhaber/scipy,WarrenWeckesser/scipy,perimosocordiae/scipy,anntzer/scipy,endolith/scipy,perimosocordiae/scipy,scipy/scipy,endolith/scipy,endolith/scipy,mdhaber/scipy,perimosocordiae/scipy,rgommers/scipy,andyfaff/scipy,Stefan-Endres/scipy,vigna/scipy,scipy/scipy,scipy/scipy,anntzer/scipy,WarrenWeckesser/scipy,ilayn/scipy,endolith/scipy,WarrenWeckesser/scipy,scipy/scipy,ilayn/scipy,mdhaber/scipy,andyfaff/scipy,anntzer/scipy,Stefan-Endres/scipy,anntzer/scipy,anntzer/scipy,mdhaber/scipy,rgommers/scipy,vigna/scipy,andyfaff/scipy,WarrenWeckesser/scipy,andyfaff/scipy,scipy/scipy,rgommers/scipy,vigna/scipy,Stefan-Endres/scipy,anntzer/scipy,perimosocordiae/scipy,ilayn/scipy,vigna/scipy,Stefan-Endres/scipy,vigna/scipy,endolith/scipy,ilayn/scipy,andyfaff/scipy,mdhaber/scipy,perimosocordiae/scipy,mdhaber/scipy,perimosocordiae/scipy,ilayn/scipy,WarrenWeckesser/scipy,Stefan-Endres/scipy,rgommers/scipy,endolith/scipy,WarrenWeckesser/scipy,andyfaff/scipy,Stefan-Endres/scipy,scipy/scipy,rgommers/scipy