chore: update keybinding for tab navigation (#802)

lua/lv-barbar/init.lua

@@ -1,6 +1,8 @@
 vim.api.nvim_set_keymap("n", "<TAB>", ":BufferNext<CR>", { noremap = true, silent = true })
 vim.api.nvim_set_keymap("n", "<S-TAB>", ":BufferPrevious<CR>", { noremap = true, silent = true })
 vim.api.nvim_set_keymap("n", "<S-x>", ":BufferClose<CR>", { noremap = true, silent = true })
+vim.api.nvim_set_keymap("n", "<S-l>", ":BufferNext<CR>", { noremap = true, silent = true })
+vim.api.nvim_set_keymap("n", "<S-h>", ":BufferPrevious<CR>", { noremap = true, silent = true })
 
 O.user_which_key["b"] = {
   name = "Buffers",