docs: Documentation update

Change-Id: I6f916eb822a59e980e8fb1134886c3431755119c
diff --git a/helper/ndn-link-control-helper.hpp b/helper/ndn-link-control-helper.hpp
index 9d8c800..326aede 100644
--- a/helper/ndn-link-control-helper.hpp
+++ b/helper/ndn-link-control-helper.hpp
@@ -31,7 +31,7 @@
 /**
  * @ingroup ndn-helpers
  * @brief Helper class to control the up or down statuss of an NDN link connecting two specific
- * nodes
+ *        nodes
  */
 class LinkControlHelper {
 public: