docs: fix capitalization in doxygen comments

Change-Id: Ibf5ee5119d12d60d382b0acef8dfd08277c18fcb
diff --git a/tests/daemon/mgmt/fib-manager.t.cpp b/tests/daemon/mgmt/fib-manager.t.cpp
index 5ab310d..09145c5 100644
--- a/tests/daemon/mgmt/fib-manager.t.cpp
+++ b/tests/daemon/mgmt/fib-manager.t.cpp
@@ -79,7 +79,7 @@
   };
 
   /**
-   * @brief check whether the nexthop record is added / removed properly
+   * @brief Check whether the nexthop record is added / removed properly.
    *
    * @param expectedNNextHops use nullopt to skip this check
    * @param faceId use nullopt to skip NextHopRecord checks