docs: update release banner (#5321)

platform/docs/docusaurus.config.js

@@ -124,9 +124,9 @@ module.exports = {
         // respectPrefersColorScheme: true,
       },
       announcementBar: {
-        id: 'ohif310_segmentation_ui_update',
+        id: 'ohif311_multimodality_rt_ultrasound',
         content:
-          '🛠️ OHIF 3.10 is here! Explore powerful new segmentation tools, including local AI-assisted workflows, real-time 3D GrowCut, segment statistics, and undo/redo. Plus, enjoy a polished new UI library and smoother interactions across the board. Read the release notes <a target="_blank" rel="noopener noreferrer" href="https://ohif.org/release-notes/3p10/">here</a>! 🔍✨',
+          'OHIF v3.11 is here! New features include multimodality fusion with viewport overlays, RT Dose visualization, dedicated ultrasound mode for cardiac imaging, DICOM Labelmap support, and advanced RT Structure Set visualization. Read the release notes <a target="_blank" rel="noopener noreferrer" href="https://ohif.org/release-notes/3p11/">here</a>!',
       },
       prism: {
         theme: require('prism-react-renderer').themes.github,