Update json-ld to change to Aricle and articleBody

Author: svekars

pytorch_sphinx_theme2/templates/layout.html

@@ -191,11 +191,12 @@
    <script type="application/ld+json">
       {
          "@context": "https://schema.org",
-         "@type": "TechArticle",
+         "@type": "Article",
          "name": {{ title|striptags|trim|tojson }},
          "headline": {{ title|striptags|trim|tojson }},
          "description": "PyTorch Documentation. Explore PyTorch, an open-source machine learning library that accelerates the path from research prototyping to production deployment. Discover tutorials, API references, and guides to help you build and deploy deep learning models efficiently.",
          "url": "{{ canonical_url|default((url_root if url_root is defined else '/') + pagename + '.html', true) }}",
+         "articleBody": {{ body|striptags|trim|tojson }},
          "author": {
            "@type": "Organization",
            "name": "PyTorch Contributors",
@@ -206,8 +207,8 @@
            "@type": "WebPage",
            "@id": "{{ canonical_url|default((url_root if url_root is defined else '/') + pagename + '.html', true) }}"
          },
-         "datePublished": "{{ doc_created|default('') }}{% if doc_created %}T00:00:00Z{% endif %}",
-         "dateModified": "{{ doc_updated|default('') }}{% if doc_updated %}T00:00:00Z{% endif %}"
+         "datePublished": "{{ doc_created|default('2023-01-01') }}T00:00:00Z",
+         "dateModified": "{{ doc_updated|default('2023-01-01') }}T00:00:00Z"
        }
    </script>
 {% endblock %}