fix(autocmds): apply conceal level change to local buffer options (#2409)

lua/lazyvim/config/autocmds.lua

@@ -90,7 +90,7 @@ vim.api.nvim_create_autocmd({ "FileType" }, {
   group = augroup("json_conceal"),
   pattern = { "json", "jsonc", "json5" },
   callback = function()
-    vim.wo.conceallevel = 0
+    vim.opt_local.conceallevel = 0
   end,
 })