adding alpha 6

Author: benfry

content/static/download.html

@@ -265,6 +265,14 @@ <h3>Pre-Releases</h3>
     <ul>
     <!-- <li>No pre-release versions are currently available.</li> -->
 
+    <li>
+        <span class="version">4.0 alpha 6</span>
+        <span class="version-date">(10 July 2021)</span>
+        <a href="https://download.processing.org/processing-4.0a6-windows64.zip">Win 64</a>
+        <a href="https://download.processing.org/processing-4.0a6-linux64.tgz">Linux 64</a>
+        <a href="https://download.processing.org/processing-4.0a6-macosx.zip">Mac OS X</a>
+    </li>
+
     <li>
         <span class="version">4.0 alpha 5</span>
         <span class="version-date">(24 June 2021)</span>
@@ -273,6 +281,7 @@ <h3>Pre-Releases</h3>
         <a href="https://download.processing.org/processing-4.0a5-macosx.zip">Mac OS X</a>
     </li>
 
+    <!--
     <li>
         <span class="version">4.0 alpha 4</span>
         <span class="version-date">(15 June 2021)</span>
@@ -281,7 +290,6 @@ <h3>Pre-Releases</h3>
         <a href="https://download.processing.org/processing-4.0a4-macosx.zip">Mac OS X</a>
     </li>
 
-    <!--
     <li>
         <span class="version">4.0 alpha 3</span>
         <span class="version-date">(17 January 2021)</span>