add another language to the highlight disable list

lua/conf/plugins/treesitter.lua

@@ -42,9 +42,10 @@ return { 'nvim-treesitter/nvim-treesitter',
         additional_vim_regex_highlighting = true,
 
         disable = function(lang, buf)
-          -- disable in diff files
-          local langs = { "diff" }
-          if table.contains(langs, lang) then
+          -- disable in some files where vim's builtin highlighting is better
+          if table.contains({
+            "diff", "tex"
+          }, lang) then
             return true
           end