Add noindex meta tag to ThankYou.cshtml

Added a new section named `Meta` in the `ThankYou.cshtml` file, which includes a meta tag with `name="robots"` and `content="noindex"`. This prevents search engines from indexing the "Thank You" page.

CatherineLynwood/Views/Home/ThankYou.cshtml

@@ -10,4 +10,8 @@
             Thank you for contacting Catherine Lynwood. Your message has been received and will be reviewed as soon as possible.
         </p>
     </div>
-</div>
+</div>
+
+@section Meta {
+    <meta name="robots" content="noindex">
+}