chore(version): move to the next beta version [BUMP BETA] (#4072)

platform/docs/docusaurus.config.js

@@ -270,7 +270,7 @@ module.exports = {
       announcementBar: {
         id: 'healthimaging',
         content:
-          '🚀 The latest version of OHIF, v3.7, has been released. You can find the release notes by following this <a target="_blank" rel="noopener noreferrer" href="https://ohif.org/release-notes/3p7/">Link!</a> 🌟',
+          '🎉 OHIF 3.8 has landed! Explore 4D and volume rendering, enhanced layout menus, streamlined visualization controls, workflow steps, and more. You can find the release notes by following this <a target="_blank" rel="noopener noreferrer" href="https://ohif.org/release-notes/3p8/">Link!</a> 🌟',
       },
       prism: {
         theme: require('prism-react-renderer/themes/github'),