Update src/starlight-overrides/Head.astro

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: alex72508

src/starlight-overrides/Head.astro

@@ -52,20 +52,27 @@ const frontmatter = entry.data;
 )}
 
 {/* Add JSON-LD structured data */}
-<script type="application/ld+json" set:html={JSON.stringify({
-  "@context": "https://schema.org",
-  "@type": "TechArticle",
-  "name": frontmatter.title,
-  "description": frontmatter.description,
-  "keywords": frontmatter.keywords?.join(', '),
-  "audience": Array.isArray(frontmatter.audience) ? frontmatter.audience.join(', ') : frontmatter.audience,
-  "difficulty": frontmatter.complexity,
-  "abstract": frontmatter.ai_summary,
-  "url": Astro.url.href,
-  ...(frontmatter.updated && { "dateModified": typeof frontmatter.updated === 'string' ? frontmatter.updated : frontmatter.updated.toISOString() }),
-  "publisher": {
-    "@type": "Organization",
-    "name": "Kinde",
-    "url": "https://kinde.com"
-  }
-})} />
+<script type="application/ld+json" set:html={JSON.stringify(Object.fromEntries(
+  Object.entries({
+    "@context": "https://schema.org",
+    "@type": "TechArticle",
+    "name": frontmatter.title,
+    "description": frontmatter.description,
+    "keywords": Array.isArray(frontmatter.keywords) ? frontmatter.keywords.join(', ') : undefined,
+    "audience": Array.isArray(frontmatter.audience) ? frontmatter.audience.join(', ') : frontmatter.audience,
+    "difficulty": frontmatter.complexity,
+    "abstract": frontmatter.ai_summary,
+    "url": Astro.url.href,
+    ...(frontmatter.updated && {
+      "dateModified":
+        typeof frontmatter.updated === 'string'
+          ? frontmatter.updated
+          : frontmatter.updated.toISOString()
+    }),
+    "publisher": {
+      "@type": "Organization",
+      "name": "Kinde",
+      "url": "https://kinde.com"
+    }
+  }).filter(([_, value]) => value !== undefined)
+))} />