fix(microsite): add missing meta description to homepage

Signed-off-by: divyamagrawal06 <ludicrouslytrue@gmail.com>

.changeset/seo-meta-fix.md

@@ -0,0 +1,5 @@
+---
+"@backstage/microsite": patch
+---
+
+Add missing meta description to the backstage.io homepage to ensure stable search engine indexing and prevent raw asset path leakage in SERP snippets.

microsite/docusaurus.config.ts

@@ -450,6 +450,12 @@ const config: Config = {
       ],
     },
     image: 'img/sharing-opengraph.png',
+    metadata: [
+      {
+        name: 'description',
+        content: 'Backstage is an open source framework for building developer portals. ',
+      },
+    ],
     footer: {
       links: [
         {