docs: vnet comment nitfixes

Type: improvement

Change-Id: Iac01d7830b53819ace8f199554be10ab89ecdb97
Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>
diff --git a/src/vnet/ipsec/ipsec.rst b/src/vnet/ipsec/ipsec.rst
index d7e0274..933d085 100644
--- a/src/vnet/ipsec/ipsec.rst
+++ b/src/vnet/ipsec/ipsec.rst
@@ -2,8 +2,8 @@
 
 .. toctree::
 
-IP Security
-===========
+IPSec (IP Security)
+===================
 
 This is not a description on how IPSec works. Please read: