chore(version): move to the next beta version [BUMP BETA] (#4939)

platform/docs/versioned_docs/version-3.10/migration-guide/3p8-to-3p9/index.md

@@ -0,0 +1,13 @@
+---
+id: 3p8-to-3p9
+title: 3.8 -> 3.9
+sidebar_position: 2
+---
+
+
+import DocCardList from '@theme/DocCardList';
+import {useCurrentSidebarCategory} from '@docusaurus/theme-common';
+
+## Migration Guide Sections
+
+<DocCardList items={useCurrentSidebarCategory().items}/>