[FAB-10494] Fix formatting in user's guide
[FAB-10494] Fix formatting in user's guide

Fix some formatting issues in the user's guide

Change-Id: I047dac47a212b5aef5f0772dc4088cf4876f6e27
Signed-off-by: Saad Karim <d1da09defa5b48f678dafc09ede657abebbe94c4@us.ibm.com>

saadk10/fabric-ca,saadk10/fabric-ca