message: replaced jspm dependency with npm equivalent
diff: import { assertSiteSnapshot, build, getSite } from "./utils.ts";
  -import footnotePlugin from "https://jspm.dev/markdown-it-footnote@3.0.3";
  +import footnotePlugin from "npm:markdown-it-footnote@3.0.3";
  Deno.test("Build a markdown site", async (t) => {
  const site = getSite({
  