Fixed typo

INSTALL.md

@@ -75,7 +75,7 @@ do this instead of step 2:
         $ cd
         $ ln -s local/mydots/dotfiles/vim/vimrc .vimrc
 
-You could actually have your .vimrc tymlink point right to local/mydots/...
+You could actually have your .vimrc symlink point right to local/mydots/...
 I find this more flexible, though.