extratations/emacs: fix links
extratations/emacs: fix links

catern/cmugpi.github.io,cmugpi/cmugpi.github.io,cmugpi/cmugpi.github.io,catern/cmugpi.github.io,cmugpi/cmugpi.github.io,catern/cmugpi.github.io,cmugpi/cmugpi.github.io,catern/cmugpi.github.io