Make corpus headline and description more helpful

Change-Id: Id63389e206b290d38a56ce7062baa5e1a426a8fa
diff --git a/templates/custom/doc/corpus.html.ep b/templates/custom/doc/corpus.html.ep
index 3f97f8e..c378ecf 100644
--- a/templates/custom/doc/corpus.html.ep
+++ b/templates/custom/doc/corpus.html.ep
@@ -5,9 +5,11 @@
 <section> 
 % my $lang = c(@{$c->localize->locale})->first(qr!^(?i:de|en)$!) // 'en';
 % if ($lang eq 'de') {
-  <h3>Aktuelle Datengrundlage: virtuelles Korpus <code>dereko-korap-2025-I</code></h3>
+  <p>Aktuelle Datengrundlage: virtuelles Korpus <code>dereko-korap-2025-I</code></p>
+  <h3>Zusammensetzung nach Quelle</h3>
 % } else {
-  <h3>Current data set: Virtual corpus <code>dereko-korap-2025-I</code></h3>
+  <p>Current data set: Virtual corpus <code>dereko-korap-2025-I</code>
+  <h3>Composition by source</h3>
 % }
   <iframe src="https://korap.ids-mannheim.de/data/dereko-korap-2025-I.html" sandbox="allow-forms allow-scripts allow-popups allow-same-origin" style="position: relative; border-width: 0; min-height: 80vh" height="100%" width="100%"></iframe>
 </section>