chore(deps): bump cross-spawn, nextra and nextra-theme-docs in /docs-site

docs-site/next-sitemap.config.js

@@ -1,9 +1,10 @@
 /** @type {import('next-sitemap').IConfig} */
-// eslint-disable-next-line functional/immutable-data
-module.exports = {
+const config = {
   siteUrl: "https://ameliorate.app/docs",
   generateIndexSitemap: false, // docs sitemap is going to be pointed at by root site's sitemap index; also we shouldn't ever have more than 50k docs pages
   changefreq: "daily", // docs don't seem like they need to be indexed more than once a day
   priority: 0.5, // match the default of the official sitemaps protocol https://www.sitemaps.org/protocol.html
   autoLastmod: false, // if true, it sets the lastmod for all pages to the time of each build, will be almost always incorrect, because docs don't change nearly as often as the project is deployed
 };
+
+export default config;

docs-site/next.config.js

@@ -1,10 +1,11 @@
-const withNextra = require("nextra")({
+import nextra from "nextra";
+
+const withNextra = nextra({
   theme: "nextra-theme-docs",
   themeConfig: "./theme.config.tsx",
 });
 
-// eslint-disable-next-line functional/immutable-data -- when trying to use ESM, nextra encounters error "The requested module 'remark-reading-time' does not provide an export named 'default'"
-module.exports = withNextra({
+export default withNextra({
   basePath: "/docs", // bit annoying, but seems like this is needed in order to proxy the main app url/docs to here https://answers.netlify.com/t/support-guide-can-i-deploy-multiple-repositories-in-a-single-site/179
   images: {
     remotePatterns: [