Added libgfortran to environment.yml of readthedocs
Added libgfortran to environment.yml of readthedocs

mdenker/elephant,NeuralEnsemble/elephant,NeuralEnsemble/elephant,JuliaSprenger/elephant,Junji110/elephant,ccluri/elephant,carloscanova/elephant,espenhgn/elephant,dholstein/elephant,alperyeg/elephant,pietroquaglio/elephant,mdenker/elephant,mdenker/elephant,carloscanova/elephant,apdavison/elephant,pietroquaglio/elephant,INM-6/elephant,INM-6/elephant,etorre/elephant,espenhgn/elephant,INM-6/elephant,apdavison/elephant,NeuralEnsemble/elephant,dholstein/elephant,ccluri/elephant,etorre/elephant,Junji110/elephant,alperyeg/elephant