Release 3.0.21: update sitemap
diff --git a/site/src/site/sitemap-dev.groovy b/site/src/site/sitemap-dev.groovy
index 8e4ed15..a27be4a 100644
--- a/site/src/site/sitemap-dev.groovy
+++ b/site/src/site/sitemap-dev.groovy
@@ -118,9 +118,9 @@
             a(href: 'versioning.html', 'version')
             yield ' of Groovy designed for JDK8+ with a new more flexible parser (aka Parrot parser).'
         }
-        version('3.0.20') {
+        version('3.0.21') {
             stable true
-//            windowsInstaller 'https://groovy.jfrog.io/artifactory/dist-release-local/groovy-windows-installer/groovy-3.0.20/'
+//            windowsInstaller 'https://groovy.jfrog.io/artifactory/dist-release-local/groovy-windows-installer/groovy-3.0.21/'
         }
         version('3.0.19') {
             stable true
diff --git a/site/src/site/sitemap-user.groovy b/site/src/site/sitemap-user.groovy
index ef5fa9c..8da3ce7 100644
--- a/site/src/site/sitemap-user.groovy
+++ b/site/src/site/sitemap-user.groovy
@@ -90,7 +90,7 @@
             '2.4.0', '2.4.1', '2.4.2', '2.4.3', '2.4.4', '2.4.5', '2.4.6', '2.4.7', '2.4.8', '2.4.9', '2.4.10', '2.4.11', '2.4.12', '2.4.13', '2.4.14', '2.4.15', '2.4.16', '2.4.17', '2.4.18', '2.4.19', '2.4.20', '2.4.21',
             '2.5.0', '2.5.1', '2.5.2', '2.5.3', '2.5.4', '2.5.5', '2.5.6', '2.5.7', '2.5.8', '2.5.9', '2.5.10', '2.5.11', '2.5.12', '2.5.13', '2.5.14', '2.5.15', '2.5.16', '2.5.17', '2.5.18', '2.5.19', '2.5.20', '2.5.21', '2.5.22', '2.5.23',
             '2.6.0-alpha-1', '2.6.0-alpha-2', '2.6.0-alpha-3', '2.6.0-alpha-4',
-            '3.0.0', '3.0.1', '3.0.2', '3.0.3', '3.0.4', '3.0.5', '3.0.6', '3.0.7', '3.0.8', '3.0.9', '3.0.10', '3.0.11', '3.0.12', '3.0.13', '3.0.14', '3.0.15', '3.0.16', '3.0.17', '3.0.18', '3.0.19', '3.0.20',
+            '3.0.0', '3.0.1', '3.0.2', '3.0.3', '3.0.4', '3.0.5', '3.0.6', '3.0.7', '3.0.8', '3.0.9', '3.0.10', '3.0.11', '3.0.12', '3.0.13', '3.0.14', '3.0.15', '3.0.16', '3.0.17', '3.0.18', '3.0.19', '3.0.20', '3.0.21',
             '4.0.0-rc-1', '4.0.0-rc-2', '4.0.0', '4.0.1', '4.0.2', '4.0.3', '4.0.4', '4.0.5', '4.0.6', '4.0.7', '4.0.8', '4.0.9', '4.0.10', '4.0.11', '4.0.12', '4.0.13', '4.0.14', '4.0.15', '4.0.16', '4.0.17', '4.0.18', '4.0.19',
             '5.0.0-alpha-1', '5.0.0-alpha-2', '5.0.0-alpha-3', '5.0.0-alpha-4', '5.0.0-alpha-5', '5.0.0-alpha-6'
     ])