Add section about VISA & invitation letter

Author: atodorov

index.html

@@ -129,6 +129,13 @@ <h1>
     contact us via the official FOSDEM Matrix chat!
 </p>
 
+<p>
+    <strong>Belgian VISA &amp; invitation letter:</strong>
+    See <a href="https://fosdem.org/2025/faq/">FOSDEM's FAQ page</a>!
+
+    <strong>IMPORTANT:</strong> devroom managers cannot issue invitation letter for you!
+</p>
+
 <h1>
 <a name="who" class="anchor" href="#who"><span class="octicon octicon-link"></span></a>Who</h1>