docs: fix cython link in installation-linux.rst
docs: fix cython link in installation-linux.rst

xpndlabs/kivy,darkopevec/kivy,jegger/kivy,gonzafirewall/kivy,rnixx/kivy,rafalo1333/kivy,edubrunaldi/kivy,bionoid/kivy,habibmasuro/kivy,CuriousLearner/kivy,janssen/kivy,arlowhite/kivy,thezawad/kivy,manthansharma/kivy,VinGarcia/kivy,habibmasuro/kivy,bliz937/kivy,kived/kivy,VinGarcia/kivy,janssen/kivy,bionoid/kivy,darkopevec/kivy,jegger/kivy,manashmndl/kivy,yoelk/kivy,gonzafirewall/kivy,akshayaurora/kivy,MiyamotoAkira/kivy,matham/kivy,ernstp/kivy,Cheaterman/kivy,jkankiewicz/kivy,jffernandez/kivy,arlowhite/kivy,thezawad/kivy,vitorio/kivy,VinGarcia/kivy,akshayaurora/kivy,jehutting/kivy,tony/kivy,Ramalus/kivy,aron-bordin/kivy,habibmasuro/kivy,iamutkarshtiwari/kivy,jkankiewicz/kivy,jehutting/kivy,MiyamotoAkira/kivy,aron-bordin/kivy,viralpandey/kivy,janssen/kivy,bhargav2408/kivy,darkopevec/kivy,yoelk/kivy,akshayaurora/kivy,matham/kivy,vitorio/kivy,bliz937/kivy,jffernandez/kivy,rafalo1333/kivy,KeyWeeUsr/kivy,mSenyor/kivy,tony/kivy,iamutkarshtiwari/kivy,ernstp/kivy,mSenyor/kivy,aron-bordin/kivy,KeyWeeUsr/kivy,autosportlabs/kivy,yoelk/kivy,kived/kivy,LogicalDash/kivy,xiaoyanit/kivy,jffernandez/kivy,matham/kivy,youprofit/kivy,rafalo1333/kivy,andnovar/kivy,xiaoyanit/kivy,Shyam10/kivy,Shyam10/kivy,xpndlabs/kivy,LogicalDash/kivy,CuriousLearner/kivy,kivy/kivy,mSenyor/kivy,cbenhagen/kivy,manashmndl/kivy,tony/kivy,yoelk/kivy,ernstp/kivy,KeyWeeUsr/kivy,cbenhagen/kivy,LogicalDash/kivy,manthansharma/kivy,CuriousLearner/kivy,Shyam10/kivy,darkopevec/kivy,viralpandey/kivy,jkankiewicz/kivy,Ramalus/kivy,matham/kivy,vitorio/kivy,xiaoyanit/kivy,kivy/kivy,kivy/kivy,arlowhite/kivy,Shyam10/kivy,jkankiewicz/kivy,KeyWeeUsr/kivy,el-ethan/kivy,viralpandey/kivy,jehutting/kivy,autosportlabs/kivy,cbenhagen/kivy,edubrunaldi/kivy,iamutkarshtiwari/kivy,bionoid/kivy,LogicalDash/kivy,youprofit/kivy,aron-bordin/kivy,jffernandez/kivy,thezawad/kivy,bhargav2408/kivy,rnixx/kivy,Ramalus/kivy,edubrunaldi/kivy,inclement/kivy,MiyamotoAkira/kivy,andnovar/kivy,manthansharma/kivy,manashmndl/kivy,MiyamotoAkira/kivy,ernstp/kivy,inclement/kivy,manthansharma/kivy,rnixx/kivy,andnovar/kivy,jegger/kivy,youprofit/kivy,autosportlabs/kivy,Cheaterman/kivy,gonzafirewall/kivy,inclement/kivy,janssen/kivy,bliz937/kivy,Cheaterman/kivy,jegger/kivy,el-ethan/kivy,xpndlabs/kivy,bhargav2408/kivy,bionoid/kivy,el-ethan/kivy,Cheaterman/kivy,gonzafirewall/kivy,kived/kivy