use vim.o instead of vim.opt in origami config

Author: SebastianBr11

lua/custom/plugins/folding.lua

@@ -11,8 +11,8 @@ return {
 
     -- recommended: disable vim's auto-folding
     init = function()
-      vim.opt.foldlevel = 99
-      vim.opt.foldlevelstart = 99
+      vim.o.foldlevel = 99
+      vim.o.foldlevelstart = 99
     end,
   },
 }