Fix missing text in test coverage

Author: OJ

features/commands/help.feature

@@ -42,6 +42,7 @@ Feature: Help command
           route         Route traffic through a session
           save          Saves the active datastores
           search        Searches module names and descriptions
+          sess          Interact with a given session
           sessions      Dump session listings and display information about sessions
           set           Sets a context-specific variable to a value
           setg          Sets a global variable to a value