fix(status): correctly check if mini.icons is loaded

Author: mehalter

lua/astroui/status/provider.lua

@@ -429,7 +429,7 @@ function M.file_icon(opts)
     local is_file = vim.bo[bufnr].buftype == ""
 
     local mini_icons_avail, mini_icons = pcall(require, "mini.icons")
-    if mini_icons_avail then -- mini.icons
+    if mini_icons_avail and _G.MiniIcons then -- mini.icons
       if is_file then
         ft_icon, _ = mini_icons.get("file", bufname)
       else