fix cut & paste mistake in Client JS version number (#407)

diff --git a/_layouts/downloads.html b/_layouts/downloads.html
index 6a4c40a..e636e55 100644
--- a/_layouts/downloads.html
+++ b/_layouts/downloads.html
@@ -392,7 +392,7 @@
                       <div class="component-releases-structure theme-deeper-aquamarine">
                         <p><ctitle>OpenWhisk Client JS</ctitle>JavaScript client library for the OpenWhisk platform</p>
                         <div class="component-release-artifact-list border-deeper-aquamarine">
-                          <version>0.10.0-incubating</version>
+                          <version>3.20.0</version>
                           <a
                             href="https://www.apache.org/dyn/closer.cgi/openwhisk/openwhisk-client-js-3.20.0-sources.tar.gz">
                             Source code</a>