docs(ts): add hint about `ensure_installed` (#3827)

utils/installer/config.example.lua

@@ -44,6 +44,9 @@ lvim.builtin.treesitter.auto_install = true
 
 -- lvim.builtin.treesitter.ignore_install = { "haskell" }
 
+-- -- always installed on startup, useful for parsers without a strict filetype
+-- lvim.builtin.treesitter.ensure_installed = { "comment", "markdown_inline", "regex" }
+
 -- -- generic LSP settings <https://www.lunarvim.org/docs/languages#lsp-support>
 
 -- --- disable automatic installation of servers

utils/installer/config_win.example.lua

@@ -66,6 +66,9 @@ lvim.builtin.treesitter.auto_install = true
 
 -- lvim.builtin.treesitter.ignore_install = { "haskell" }
 
+-- -- ensure these parsers are always installed, useful for those without a strict filetype
+-- lvim.builtin.treesitter.ensure_installed = { "comment", "markdown_inline", "regex" }
+
 -- -- generic LSP settings <https://www.lunarvim.org/docs/languages#lsp-support>
 
 -- --- disable automatic installation of servers