change banner to nitter is back

server/templates/instances.html.j2

@@ -24,8 +24,8 @@
 <body>
   <div class="container">
     <h1>Nitter Instance Uptime & Health</h1>
-    <div class="alert alert-warning text-center" role="alert">
-      Nitter is mostly dead! <a href="/rip">&gt;&gt;Read More&lt;&lt;</a>
+    <div class="alert alert-success text-center" role="alert">
+      Nitter is back. <a href="https://github.com/zedeus/nitter/discussions/1212">More Info</a>
     </div>
     <p><a href="/about">About</a></p>
     <p>Please <b>do NOT use these instances for