Correct formatting in README for positional arguments

Fix formatting of positional arguments section

Author: psmode

README.md

@@ -40,9 +40,9 @@ Python 3.6 and uses the [Beautiful Soup](https://pypi.org/project/beautiful
 #### Options
 
 ##### positional arguments:
-
+```
  TPhost IP address or hostname of switch
-
+```
 ##### optional arguments:
 ```
  -h, --help show this help message and exit