docs: 📦 Update docusaurus to beta-14

Need to move gtag options from themeconfig to preset-classic configuration. Change introduce with docusaurus beta.10

https://github.com/facebook/docusaurus/pull/5832
Signed-off-by: jffarge <jf@dagger.io>

website/docusaurus.config.js

@@ -70,10 +70,6 @@ module.exports = {
         lightIcon: "img/Icon_Day-mode.svg",
       },
     },
-    gtag: {
-      trackingID: "G-RDXG80F635",
-      anonymizeIP: true,
-    },
   },
   presets: [
     [
@@ -86,6 +82,10 @@ module.exports = {
           routeBasePath: "/",
           remarkPlugins: [remarkCodeImport],
         },
+        gtag: {
+          trackingID: "G-RDXG80F635",
+          anonymizeIP: true,
+        },
         theme: {
           customCss: require.resolve("./src/css/custom.scss"),
         },