chore: NO-JIRA update default og image (#1149)

Author: francisrupert

apps/dialtone-documentation/docs/.vuepress/config.js

@@ -121,7 +121,7 @@ export default defineUserConfig({
 
   extendsPage: (page) => {
     const SITE_URL = 'https://dialtone.dialpad.com';
-    const DEFAULT_IMAGE = `${SITE_URL}/assets/images/home-hero.png`;
+    const DEFAULT_IMAGE = `${SITE_URL}/assets/images/default-og-image.png`;
 
     const title = page.frontmatter.title || page.frontmatter.heading || page.title || 'Dialtone Design System';
     const seoTitle = title === 'Dialtone Design System' ? title : `${title} | Dialtone Design System`;