DOC: fix link to numpy-discussion
DOC: fix link to numpy-discussion

pdebuyl/numpy,numpy/numpy,charris/numpy,jakirkham/numpy,pdebuyl/numpy,charris/numpy,mhvk/numpy,mattip/numpy,seberg/numpy,anntzer/numpy,numpy/numpy,rgommers/numpy,jakirkham/numpy,seberg/numpy,endolith/numpy,charris/numpy,rgommers/numpy,seberg/numpy,rgommers/numpy,jakirkham/numpy,seberg/numpy,endolith/numpy,mhvk/numpy,pdebuyl/numpy,numpy/numpy,jakirkham/numpy,rgommers/numpy,mattip/numpy,endolith/numpy,mattip/numpy,pdebuyl/numpy,anntzer/numpy,mhvk/numpy,endolith/numpy,charris/numpy,mattip/numpy,anntzer/numpy,numpy/numpy,mhvk/numpy,jakirkham/numpy,anntzer/numpy,mhvk/numpy