plugins/lsp: change deno root_dir pattern

plugins/lsp/lspconfig.lua

@@ -80,7 +80,9 @@ lsp_config.eslint.setup({})
 -- deno
 -- To appropriately highlight codefences returned from denols
 vim.g.markdown_fenced_languages = { "ts=typescript" }
-lsp_config.denols.setup({})
+lsp_config.denols.setup({
+	root_dir = lsp_config.util.root_pattern("deno.json", "deno.jsonc"),
+})
 
 -- rust
 lsp_config.rust_analyzer.setup({