Fix branch name

Author: marcphilipp

index.html

@@ -51,7 +51,7 @@ <h2>Latest Release</h2>
     </p>
     <p>
       JUnit artifacts are deployed to Maven Central and can be downloaded using the above links.
-      All files are signed using the keys listed in the <a href="{{ site.current_repo_url }}/blob/master/KEYS">KEYS</a> file.
+      All files are signed using the keys listed in the <a href="{{ site.current_repo_url }}/blob/main/KEYS">KEYS</a> file.
     </p>
     <h2>Upcoming Events</h2>
     <div id="events">