fix(docs): update Open Graph and Twitter meta tags for improved sharing (#1075)

Co-authored-by: Alan de Freitas <alandefreitas@gmail.com>

Author: julioest

docs/website/assets/mrdocs-social.jpg

@@ -13,13 +13,15 @@
     <meta name="description" content="Mr.Docs is a full-fidelity C++ documentation generator that reads your code and comments to produce precise, publish-ready reference docs.">
     <link rel="canonical" href="https://www.mrdocs.com">
     <meta name="robots" content="index, follow">
+    <meta property="og:type" content="website">
+    <meta property="og:url" content="https://www.mrdocs.com">
     <meta property="og:title" content="Mr.Docs">
     <meta property="og:description" content="Mr.Docs is a full-fidelity C++ documentation generator that reads your code and comments to produce precise, publish-ready reference docs.">
-    <meta property="og:url" content="https://www.mrdocs.com">
+    <meta property="og:image" content="https://www.mrdocs.com/assets/social/mrdocs-social.jpg">
     <meta property="og:site_name" content="Mr.Docs">
-    <meta property="og:type" content="website">
     <meta name="twitter:card" content="summary_large_image">
-    <meta property="twitter:domain" content="https://www.mrdocs.com">
+    <meta name="twitter:site" content="@cppalliance">
+    <meta name="twitter:creator" content="@cppalliance">
     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/github.min.css">
     <link rel="stylesheet" href="styles.css">
 </head>
@@ -364,9 +366,8 @@ <h3>Parameters</h3>
 
     Linear in n.
 
-    @return Whether or not n is prime.
+    @return Whether `n` is prime.
     @param n The number to test
-
 */</span>
 <span class="hljs-function"><span class="hljs-type">bool</span>
 <span class="hljs-title">is_prime</span><span class="hljs-params">(<span class="hljs-type">unsigned</span> <span class="hljs-type">long</span> <span class="hljs-type">long</span> n)</span> <span class="hljs-keyword">noexcept</span></span>;</code></pre>
@@ -403,7 +404,7 @@ <h3>Complexity</h3>
 </div>
 <div>
 <h3>Return Value</h3>
-<span>Whether or not n is prime.</span>
+<span>Whether <code>n</code> is prime.</span>
 </div>
 <div>
 <h3>Parameters</h3>

docs/website/index.html

@@ -1,2 +1,5 @@
 User-agent: *
 Allow: /
+ 
+User-agent: Twitterbot
+Disallow: