fix(indentlines): set indent_char to LineLeft (#3741)

lua/lvim/core/indentlines.lua

@@ -18,6 +18,7 @@ M.config = function()
         "text",
       },
       char = lvim.icons.ui.LineLeft,
+      indent_char = lvim.icons.ui.LineLeft,
       show_trailing_blankline_indent = false,
       show_first_indent_level = true,
       use_treesitter = true,