plugins: update config to the ibl version 3

- Updates the configuration accordingly to the ident blankline plugin
  version 3.

Co-Authored-by: iGor milhit <igor@milhit.ch>

init.lua

@@ -173,9 +173,10 @@ require('lazy').setup({
     'lukas-reineke/indent-blankline.nvim',
     -- Enable `lukas-reineke/indent-blankline.nvim`
     -- See `:help indent_blankline.txt`
+    main = "ibl",
     opts = {
-      char = '┊',
+      indent = {char = '┊'},
-      show_trailing_blankline_indent = false,
+      whitespace = {remove_blankline_trail = false},
     },
   },