fix/migration 3p11 (#5370)

platform/docs/docusaurus.config.js

@@ -3,6 +3,11 @@ const fs = require('fs');
 const versions = fs.readFileSync('../../version.txt', 'utf8').split('\n');
 
 const ArchivedVersionsDropdownItems = [
+  {
+    version: '3.10',
+    href: 'https://v3p10.docs.ohif.org',
+    isExternal: true,
+  },
   {
     version: '3.9',
     href: 'https://v3p9.docs.ohif.org',