Update the OpenWhisk Core version (#454)

diff --git a/_layouts/downloads.html b/_layouts/downloads.html
index e85b8a0..c06cebf 100644
--- a/_layouts/downloads.html
+++ b/_layouts/downloads.html
@@ -113,11 +113,11 @@
                         <p><ctitle>OpenWhisk</ctitle>Core OpenWhisk Platform Components.</p>
                         <div class="component-release-artifact-list border-deeper-sea-green">
                           <version>0.9.0-incubating</version>
-                          <a href="https://www.apache.org/dyn/closer.cgi/openwhisk/incubating/openwhisk-0.9.0-incubating-sources.tar.gz">
+                          <a href="https://www.apache.org/dyn/closer.cgi/openwhisk/OpenWhisk-1.0.0-sources.tar.gz">
                             Source code</a>
-                          <a href="https://downloads.apache.org/openwhisk/incubating/openwhisk-0.9.0-incubating-sources.tar.gz.sha512">SHA-512 checksum</a>
+                          <a href="https://downloads.apache.org/openwhisk/OpenWhisk-1.0.0-sources.tar.gz.sha512">SHA-512 checksum</a>
                           <a
-                            href="https://downloads.apache.org/openwhisk/incubating/openwhisk-0.9.0-incubating-sources.tar.gz.asc">PGP signature</a>
+                            href="https://downloads.apache.org/openwhisk/OpenWhisk-1.0.0-sources.tar.gz.asc">PGP signature</a>
                         </div>
                       </div>