Fix git global ignore typo

setup.sh

@@ -43,7 +43,7 @@ echo "Touched known hosts."
 # Git config
 git config --global color.ui true
 git config --global core.editor vim
-git config --global core.excludesfiles ~/dotfiles/git/globalignore
+git config --global core.excludesfile ~/dotfiles/git/globalignore
 git config --global diff.mnemonicPrefix true
 echo "Git config done."