vim:keys: Center search on <CR> too

In addition to center the cursor-line on `n` do it right after accepting
the search as well.

.config/vim/vimrc.d/40-keys.vim

@@ -262,6 +262,10 @@ vnoremap = =gv
 
 " Center search results
 noremap n nzz
+cnoremap <expr> <CR> "<CR>" .
+	\ (getcmdtype() == '/' \|\| getcmdtype() == '?'
+		\ ? "zz"
+		\ : "")
 
 " Switch to lower/upper case
 nnoremap <leader><C-U> gUl