Update corpus composition link for dereko-korap-2026-I

Change-Id: Ie948262ef6e604f30b20232e80d853267c2662f8
diff --git a/templates/custom/doc/corpus.html.ep b/templates/custom/doc/corpus.html.ep
index 4e88960..6f33a5a 100644
--- a/templates/custom/doc/corpus.html.ep
+++ b/templates/custom/doc/corpus.html.ep
@@ -3,9 +3,9 @@
 %= page_title
 
 <section> 
-  <p><%== loc 'currentdb', vc => 'dereko-korap-2025-I' %></p>
+  <p><%== loc 'currentdb', vc => 'dereko-korap-2026-I' %></p>
   <h3><%= loc 'compositionbysource' %></h3>
-  <iframe src="https://korap.ids-mannheim.de/data/dereko-korap-2025-I.html" sandbox="allow-forms allow-same-origin allow-scripts allow-popups" style="position: relative; border-width: 0; min-height: 40vh" height="45%" width="100%"></iframe>
+  <iframe src="https://korap.ids-mannheim.de/data/dereko-korap-2026-I.html" sandbox="allow-forms allow-same-origin allow-scripts allow-popups" style="position: relative; border-width: 0; min-height: 40vh" height="45%" width="100%"></iframe>
 
   <h3><%= loc 'usefulvcs' %></h3>
   <iframe src="https://korap.ids-mannheim.de/data/useful_dereko_corpora.html" sandbox="allow-forms allow-same-origin allow-scripts allow-popups" style="position: relative; border-width: 0; min-height: 40vh" height="45%" width="100%"></iframe>