Migrate documentation to roxygen2md

Change-Id: If5370cd207770f3e05c6f5cd063bd2a414b92bcb
diff --git a/man/RKorAPClient-package.Rd b/man/RKorAPClient-package.Rd
index e60c721..e59738e 100644
--- a/man/RKorAPClient-package.Rd
+++ b/man/RKorAPClient-package.Rd
@@ -33,7 +33,7 @@
 \itemize{
   \item \url{https://github.com/KorAP/RKorAPClient/}
   \item \url{https://korap.ids-mannheim.de/}
-  \item \url{https://www1.ids-mannheim.de/kl/projekte/korap.html}
+  \item \url{https://www.ids-mannheim.de/digspra/kl/projekte/korap}
   \item Report bugs at \url{https://github.com/KorAP/RKorAPClient/issues}
 }