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

@@ -25,13 +25,27 @@ const frontmatter = entry.data;
 
 {/* Add meta tags for the new fields */}
 {frontmatter.audience && (
-  <meta name="audience" content={Array.isArray(frontmatter.audience) ? frontmatter.audience.join(', ') : frontmatter.audience} />
+  <meta
+    name="audience"
+    content={
+      Array.isArray(frontmatter.audience)
+        ? frontmatter.audience.join(', ')
+        : frontmatter.audience
+    }
+  />
 )}
 {frontmatter.complexity && (
   <meta name="complexity" content={frontmatter.complexity} />
 )}
 {frontmatter.keywords && (
-  <meta name="keywords" content={frontmatter.keywords.join(', ')} />
+  <meta
+    name="keywords"
+    content={
+      Array.isArray(frontmatter.keywords)
+        ? frontmatter.keywords.join(', ')
+        : ''
+    }
+  />
 )}
 {frontmatter.ai_summary && (
   <meta name="ai-summary" content={frontmatter.ai_summary} />