Use "next" as version ID on the main branch (#492)

Distinguish the main-branch version from the release version numbers by using "next" as version id.

Author: camillobruni

index.html

@@ -13,7 +13,7 @@
             <section id="home">
                 <a href="#home" class="logo">
                     <img srcset="resources/[email protected] 2x" src="resources/logo.png" alt="Speedometer" />
-                    <div class="version">3.0</div>
+                    <div class="version next">next</div>
                 </a>
                 <div class="content">
                     <p>Speedometer is a browser benchmark that measures the responsiveness of Web applications. It uses demo web applications to simulate user actions such as adding to-do items.</p>

resources/main.css

@@ -103,6 +103,12 @@ main {
     top: -105px;
 }
 
+.next {
+    right: -13px;
+    top: -110px;
+    color: var(--highlight);
+}
+
 h1 {
     margin-top: 30px;
     font-size: 40px;