Add LinkedIn Open Graph image hints

Author: DPnimo11

src/layouts/BaseLayout.astro

@@ -60,6 +60,8 @@ const graph = [
     <meta property="og:description" content={description} />
     <meta property="og:url" content={canonicalUrl} />
     <meta property="og:image" content={socialImageUrl} />
+    <meta property="og:image:secure_url" content={socialImageUrl} />
+    <meta property="og:image:type" content="image/jpeg" />
     <meta property="og:image:width" content="1200" />
     <meta property="og:image:height" content="630" />
     <meta property="og:image:alt" content="Darren Wang portfolio preview" />