[Docs] - Fix social share image URL

Author: matthew-carroll

doc/website/source/_includes/layouts/docs_page.jinja

@@ -26,7 +26,7 @@
     <meta name="twitter:url" content="https://fluttergoldens.com" />
     <meta name="twitter:title" content="Flutter Test Goldens" />
     <meta name="twitter:description" content="The best package for writing golden tests." />
-    <meta name="twitter:image" content="https://fluttershaders.com/images/branding/social.png" />
+    <meta name="twitter:image" content="https://fluttergoldens.com/images/branding/social.png" />
 
     <link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-QWTKZyjpPEjISv5WaRU9OFeRpok6YctnYmDr5pNlyT2bRjXh0JMhjY6hW+ALEwIH" crossorigin="anonymous">
     <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-YvpcrYf0tY3lHB60NNkmXc5s9fDVZLESaAA55NDzOxhy9GkcIdslK1eN7N6jIeHz" crossorigin="anonymous"></script>