feat(indent_blankline): update config for version 3

lua/plugins/indent_blankline.lua

@@ -3,8 +3,6 @@ return {
   'lukas-reineke/indent-blankline.nvim',
   -- Enable `lukas-reineke/indent-blankline.nvim`
   -- See `:help indent_blankline.txt`
-  opts = {
+  main = 'ibl',
-    char = '┊',
+  opts = {},
-    show_trailing_blankline_indent = false,
-  },
 }