Change announcement isCloseable to false

Author: josh-wong

docusaurus.config.js

@@ -495,7 +495,7 @@ const config = {
           // '<b>Announcing the release of ScalarDB X.X!🚀 For details on what\'s included in this new version, see the <a target="_self" rel="noopener noreferrer" href="/docs/latest/releases/release-notes">release notes</a>.<b>',
         backgroundColor: '#2673BB',
         textColor: '#FFFFFF',
-        isCloseable: true,
+        isCloseable: false,
       },
       zoom: {
         selector: '.markdown :not(em) > img',