Fixed the download typo

Signed-off-by: Zhou Fang <zhou.fang@eclipse-foundation.org>
diff --git a/20anniversary/index.php b/20anniversary/index.php
index 50099a5..b8e1a1f 100644
--- a/20anniversary/index.php
+++ b/20anniversary/index.php
@@ -48,7 +48,7 @@
 $html = ob_get_clean();
 
 $variables = array();
-$variables['btn_cfa']['text'] = 'Dowaload';
+$variables['btn_cfa']['text'] = 'Download';
 $variables['btn_cfa']['href'] = '/downloads/packages/installer';
 $variables['btn_cfa']['class'] = 'btn btn-huge btn-primary';