docs(analytics): readd thesemetrics

Author: anymaniax

docs/src/pages/_app.js

@@ -37,6 +37,7 @@ function MyApp({ Component, pageProps, err }) {
           }}
         />
         <script async src="https://cdn.splitbee.io/sb.js"></script>
+        <script async src="https://unpkg.com/thesemetrics@latest"></script>
       </Head>
       <SearchProvider>
         <Component {...pageProps} err={err} />