Fix typo in docstring numpy.random.beta doc
Fix typo in docstring numpy.random.beta doc

$\Beta(a,b)$ with a,b > 0 not >=
See https://en.wikipedia.org/wiki/Beta_distribution
MSeifert04/numpy,charris/numpy,ahaldane/numpy,jakirkham/numpy,seberg/numpy,pizzathief/numpy,jorisvandenbossche/numpy,mattip/numpy,endolith/numpy,pbrod/numpy,pdebuyl/numpy,pdebuyl/numpy,endolith/numpy,rgommers/numpy,MSeifert04/numpy,rgommers/numpy,mhvk/numpy,ahaldane/numpy,endolith/numpy,jorisvandenbossche/numpy,seberg/numpy,shoyer/numpy,rgommers/numpy,shoyer/numpy,MSeifert04/numpy,grlee77/numpy,WarrenWeckesser/numpy,pbrod/numpy,abalkin/numpy,seberg/numpy,madphysicist/numpy,mattip/numpy,pdebuyl/numpy,mhvk/numpy,jakirkham/numpy,madphysicist/numpy,grlee77/numpy,jorisvandenbossche/numpy,ahaldane/numpy,jorisvandenbossche/numpy,grlee77/numpy,pizzathief/numpy,simongibbons/numpy,simongibbons/numpy,ahaldane/numpy,anntzer/numpy,WarrenWeckesser/numpy,pdebuyl/numpy,MSeifert04/numpy,jorisvandenbossche/numpy,madphysicist/numpy,numpy/numpy,numpy/numpy,grlee77/numpy,abalkin/numpy,ahaldane/numpy,rgommers/numpy,pbrod/numpy,mhvk/numpy,pbrod/numpy,jakirkham/numpy,anntzer/numpy,jakirkham/numpy,charris/numpy,shoyer/numpy,simongibbons/numpy,anntzer/numpy,jakirkham/numpy,endolith/numpy,madphysicist/numpy,madphysicist/numpy,charris/numpy,grlee77/numpy,WarrenWeckesser/numpy,pizzathief/numpy,shoyer/numpy,mattip/numpy,pizzathief/numpy,numpy/numpy,pbrod/numpy,MSeifert04/numpy,abalkin/numpy,WarrenWeckesser/numpy,pizzathief/numpy,mattip/numpy,anntzer/numpy,mhvk/numpy,simongibbons/numpy,simongibbons/numpy,WarrenWeckesser/numpy,numpy/numpy,mhvk/numpy,charris/numpy,shoyer/numpy,seberg/numpy