Try to prevent that annoying message.

lua/plugins/treesitter.lua

@@ -2,6 +2,7 @@ return {
   {
     "nvim-treesitter/nvim-treesitter",
     lazy = false,
+    dependencies = "AstroNvim/astrocore",
     opts = function(_, opts)
       -- add more things to the ensure_installed table protecting against community packs modifying it
       opts.ensure_installed = require("astrocore").list_insert_unique(opts.ensure_installed, {