nixpkgs/neovim: also use sort_mru for telescope buffer

.config/nixpkgs/neovim/plugins.lua

@@ -16,6 +16,7 @@ require('telescope').setup({
   pickers = {
     buffers = {
       sort_lastused = true,
+      sort_mru = true,
     },
     find_files = {
       find_command = { "fd", "--type", "f", "--strip-cwd-prefix" }