Updated supported platforms to include NET8

Author: snakefoot

index.html

@@ -146,7 +146,7 @@ <h1 class="page-header" id="support">Support</h1>
         <div>
             NLog supports the following platforms:
             <ul>
-                <li>.NET 5 &amp; 6 (.NET Standard 2.0)</li>
+                <li>.NET 5, 6, 7 &amp; 8 (.NET Standard 2.0)</li>
                 <li>.NET Framework 3.5 - 4.8</li>
                 <li>.NET Core 1.0 - 3.1</li>
                 <li>Xamarin Android + iOS (.NET Standard)</li>