DOC: Fix link to PEP-484
DOC: Fix link to PEP-484

Co-authored-by: Bas van Beek <fe8dd7c8b3782daddf8570ed602ac1fc6e8f505c@users.noreply.github.com>
mattip/numpy,endolith/numpy,mhvk/numpy,charris/numpy,rgommers/numpy,anntzer/numpy,rgommers/numpy,rgommers/numpy,charris/numpy,mhvk/numpy,mhvk/numpy,numpy/numpy,anntzer/numpy,mattip/numpy,mhvk/numpy,endolith/numpy,anntzer/numpy,endolith/numpy,charris/numpy,mattip/numpy,mhvk/numpy,charris/numpy,anntzer/numpy,rgommers/numpy,numpy/numpy,numpy/numpy,numpy/numpy,endolith/numpy,mattip/numpy