fix(previewer): use new winid after toggle preview window

Author: xieyonn

lua/telescope/previewers/buffer_previewer.lua

@@ -416,9 +416,9 @@ previewers.new_buffer_previewer = function(opts)
 
   function opts.preview_fn(self, entry, status)
     local preview_winid = status.layout.preview and status.layout.preview.winid
+    preview_window_id = preview_winid
     if get_bufnr(self) == nil then
       set_bufnr(self, api.nvim_win_get_buf(preview_winid))
-      preview_window_id = preview_winid
     end
 
     if opts.get_buffer_by_name and get_bufnr_by_bufname(self, opts.get_buffer_by_name(self, entry)) then