Update web client title to Livebook

lib/livebook_web/live/home_live.ex

@@ -18,7 +18,7 @@ defmodule LivebookWeb.HomeLive do
   def render(assigns) do
     ~L"""
     <header class="flex justify-center p-4 border-b">
-      <h1 class="text-2xl font-medium">LiveBook</h1>
+      <h1 class="text-2xl font-medium">Livebook</h1>
     </header>
     <div class="container max-w-5xl w-full mx-auto p-4 pb-8 flex flex-col items-center space-y-4">
       <div class="w-full flex justify-end">

lib/livebook_web/templates/layout/root.html.leex

@@ -5,7 +5,7 @@
     <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
     <%= csrf_meta_tag() %>
-    <%= live_title_tag assigns[:page_title] || "LiveBook" %>
+    <%= live_title_tag assigns[:page_title] || "Livebook" %>
     <link phx-track-static rel="stylesheet" href="<%= Routes.static_path(@conn, "/css/app.css") %>"/>
     <script defer phx-track-static type="text/javascript" src="<%= Routes.static_path(@conn, "/js/app.js") %>"></script>
   </head>

test/livebook_web/live/home_live_test.exs

@@ -7,8 +7,8 @@ defmodule LivebookWeb.HomeLiveTest do
 
   test "disconnected and connected render", %{conn: conn} do
     {:ok, view, disconnected_html} = live(conn, "/")
-    assert disconnected_html =~ "LiveBook"
-    assert render(view) =~ "LiveBook"
+    assert disconnected_html =~ "Livebook"
+    assert render(view) =~ "Livebook"
   end
 
   test "redirects to session upon creation", %{conn: conn} do