Revert pypi badge again as the svg broke
Revert pypi badge again as the svg broke

This reverts the pypi badge back to the pypip.in provided one
because the shields.io one failed to render properly (and also
wasn't on https).

skylarjhdownes/pytest,jb098/pytest,hunse/pytest,hunse/pytest,bukzor/pytest,Bjwebb/pytest,mhils/pytest,ionelmc/pytest,omarkohl/pytest,Carreau/pytest,MichaelAquilina/pytest,Bachmann1234/pytest,untitaker/pytest,mhils/pytest,rouge8/pytest,The-Compiler/pytest,ropez/pytest,ionelmc/pytest,alfredodeza/pytest,bukzor/pytest,Haibo-Wang-ORG/pytest,gabrielcnr/pytest,nicoddemus/repo-test,doordash/pytest,tomviner/pytest,oleg-alexandrov/pytest,codewarrior0/pytest,ghostsquad/pytest,tgoodlet/pytest,vodik/pytest,nicoddemus/pytest,jaraco/pytest,takluyver/pytest,The-Compiler/pytest,txomon/pytest,hpk42/pytest,wfxiang08/pytest,mbirtwell/pytest,ojake/pytest,vmalloc/dessert,pelme/pytest,userzimmermann/pytest,tomviner/pytest,ghostsquad/pytest,wfxiang08/pytest,pelme/pytest,ddboline/pytest,tareqalayan/pytest,davidszotten/pytest,lukas-bednar/pytest,chillbear/pytest,chiller/pytest,rouge8/pytest,JonathonSonesen/pytest,Bjwebb/pytest,MengJueM/pytest,icemac/pytest,bubenkoff/pytest,ropez/pytest,JonathonSonesen/pytest,ericdill/pytest,oleg-alexandrov/pytest,hackebrot/pytest,flub/pytest,markshao/pytest,vodik/pytest,Carreau/pytest,malinoff/pytest,codewarrior0/pytest,chillbear/pytest,hpk42/pytest,doordash/pytest,mbirtwell/pytest,bubenkoff/pytest,nicoddemus/repo-test,untitaker/pytest,Bachmann1234/pytest,gabrielcnr/pytest,inirudebwoy/pytest,eli-b/pytest,MengJueM/pytest,rmfitzpatrick/pytest,Akasurde/pytest,pytest-dev/pytest,inirudebwoy/pytest,abusalimov/pytest,mdboom/pytest,pfctdayelise/pytest,mdboom/pytest,lukas-bednar/pytest,RonnyPfannschmidt/pytest,nicoddemus/pytest,abusalimov/pytest,ojake/pytest,jb098/pytest,Haibo-Wang-ORG/pytest,etataurov/pytest,icemac/pytest,chiller/pytest,omarkohl/pytest,takluyver/pytest,ericdill/pytest,userzimmermann/pytest