Live page SEO optional chaining (#12513)

* Live page SEO optional chaining

* One more to help me sleep at night

Author: amoore108

src/app/lib/seoUtils/getLiveBlogPostingSchema/index.ts

@@ -45,7 +45,8 @@ export default ({
         '@type': 'BlogPosting',
         headline:
           // @ts-expect-error - deeply nested
-          headlineBlock?.model.blocks[0].model.blocks[0].model.text ?? null,
+          headlineBlock?.model.blocks?.[0]?.model.blocks?.[0]?.model.text ??
+          null,
         publisher: {
           '@type': 'Organization',
           name: brandName,