Update download.html

Download for P4a2

Author: REAS

content/static/download.html

@@ -264,13 +264,24 @@ <h3>Stable Releases</h3>
     <h3>Pre-Releases</h3>
     <ul>
       <!-- <li>No pre-release versions are currently available.</li> -->
+
+      <li>
+        <span class="version">4.0 alpha 2</span>
+        <span class="version-date">(15 September 2020)</span>
+        <a href="https://download.processing.org/processing-4.0a2-windows64.zip">Win 64</a>
+        <a href="https://download.processing.org/processing-4.0a2-linux64.tgz">Linux 64</a>
+        <a href="https://download.processing.org/processing-4.0a2-macosx.zip">Mac OS X</a>
+    </li>
+
+    <!--
     <li>
         <span class="version">4.0 alpha 1</span>
         <span class="version-date">(18 January 2020)</span>
         <a href="https://download.processing.org/processing-4.0a1-windows64.zip">Win 64</a>
         <a href="https://download.processing.org/processing-4.0a1-linux64.tgz">Linux 64</a>
         <a href="https://download.processing.org/processing-4.0a1-macosx.zip">Mac OS X</a>
     </li>
+    -->
 
     <!--
       <li>