update to only do ccc highlight if available

lua/autocommands.lua

@@ -27,11 +27,13 @@ vim.api.nvim_create_autocmd("BufRead", {
   command = "set filetype=dockerfile",
 })
 
+if vim.fn.exists(":CccHighlighterEnable") ~= 0 then
   vim.api.nvim_create_autocmd("BufRead", {
     callback = function()
       vim.cmd.CccHighlighterEnable()
     end,
   })
+end
 
 -- AUto exit insert mode whenever we switch screens
 vim.api.nvim_create_autocmd({ "BufEnter", "BufWinEnter" }, {