Update index.html

date swap

www/index.html

@@ -119,7 +119,7 @@ <h3>Call for papers</h3>
       <p class="text in-sidenote">More information is provided on a separate page — <a href="call-for-papers.html" class="link">Call for papers</a>
       </p>
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-    <p class="text">Registration of submissions for the sessions that will make up the program of the future event is currently underway. Registration will last until April 30, 2024<br></p>
+    <p class="text">Registration of submissions for the sessions that will make up the program of the future event is currently underway. Registration will last until May 31, 2024<br></p>
     <a href="https://cfp.openstreetmap.org.pl/state-of-the-map-europe-2024/submit/" class="button w-button">Submit a proposal</a>
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