What is the right way to add extended_filetypes?

[zer09]

This is my config

	{
		"saghen/blink.cmp",
		version = "1.*",
		dependencies = {
			"onsails/lspkind.nvim",
			"xzbdmw/colorful-menu.nvim",
			{
				"L3MON4D3/LuaSnip",
				-- follow latest release.
				version = "v2.*", -- Replace <CurrentMajor> by the latest released major (first number of latest release)
				-- install jsregexp (optional!).
				build = "make install_jsregexp",
				dependencies = {
					{
						"rafamadriz/friendly-snippets",
						config = function()
							require("luasnip.loaders.from_vscode").lazy_load()
						end,
					},
				},
			},
		},
		opts = {
			fuzzy = { implementation = "rust" },
			snippets = { preset = "luasnip" },
			sources = {
				default = { "lazydev", "lsp", "path", "snippets", "buffer" },
				providers = {
					lazydev = {
						name = "LazyDev",
						module = "lazydev.integrations.blink",
						-- make lazydev completions top priority (see `:h blink.cmp`)
						score_offset = 100,
					},
					snippets = {
						opts = {
							friendly_snippets = true, -- default

							-- see the list of frameworks in: https://github.com/rafamadriz/friendly-snippets/tree/main/snippets/frameworks
							-- and search for possible languages in: https://github.com/rafamadriz/friendly-snippets/blob/main/package.json
							-- the following is just an example, you should only enable the frameworks that you use
							extended_filetypes = {
								markdown = { "jekyll" },
								sh = { "shelldoc" },
								php = { "phpdoc" },
								cpp = { "unreal" },
							},
						},
					},
				},
			},
			keymap = {
				preset = "enter",
				["<Tab>"] = { "select_next", "fallback" },
				["<S-Tab>"] = { "select_prev", "fallback" },
				["<C-Up>"] = { "scroll_documentation_up", "fallback" },
				["<C-Down>"] = { "scroll_documentation_down", "fallback" },
				[",."] = { "cancel" },
			},
			appearance = {
				use_nvim_cmp_as_default = true,
			},
			completion = {
				documentation = {
					auto_show = false,
					window = {
						border = "rounded",
					},
				},
				menu = {
					border = "rounded",
					draw = {
						columns = { { "kind_icon" }, { "label" }, { "kind" }, { "source_name" } },
						components = {
							label = {
								text = function(ctx)
									return require("colorful-menu").blink_components_text(ctx)
								end,
								highlight = function(ctx)
									return require("colorful-menu").blink_components_highlight(ctx)
								end,
							},
							kind_icon = {
								text = function(ctx)
									local icon = ctx.kind_icon
									if vim.tbl_contains({ "Path" }, ctx.source_name) then
										local dev_icon, _ = require("nvim-web-devicons").get_icon(ctx.label)
										if dev_icon then
											icon = dev_icon
										end
									else
										icon = require("lspkind").symbolic(ctx.kind, {
											mode = "symbol",
										})
									end

									return icon .. ctx.icon_gap
								end,

								-- Optionally, use the highlight groups from nvim-web-devicons
								-- You can also add the same function for `kind.highlight` if you want to
								-- keep the highlight groups in sync with the icons.
								highlight = function(ctx)
									local hl = ctx.kind_hl
									if vim.tbl_contains({ "Path" }, ctx.source_name) then
										local dev_icon, dev_hl = require("nvim-web-devicons").get_icon(ctx.label)
										if dev_icon then
											hl = dev_hl
										end
									end
									return hl
								end,
							},
							source_name = {
								text = function(ctx)
									return "[" .. ctx.source_name .. "]"
								end,
							},
						},
					},
				},
			},
		},
	},

but I'm getting this error

how should i add extended_filetypes on my config?