fix link

Author: mkoculak

retreat_2026.html

@@ -52,7 +52,7 @@ <h2>Lusławice, 25th to 29th of March, 2026</h2>
           <div id="conf-info-box">
           <div id="conf-info-sub">Programme:</div>
           <div id="conf-info-con">
-            You can find the program (here)[./retreat_2026.pdf].
+            You can find the program [here](./retreat_2026.pdf).
               <!-- <p><span style="font-weight: 400;">Thursday: </span></p>
               <ul>
                   <li><strong>Paweł Motyka -</strong> Modeling the Stream of Consciousness: A State-Space Framework with VR-Induced Experiential Alterations </li>