Updated docs

documentation/modules/exploit/linux/local/polkit_dbus_auth_bypass.md

@@ -1,6 +1,6 @@
 ## Description
 
-This module exploits a authentication bypass in Linux machines that make use of the polkit is a system service.
+This module exploits a authentication bypass in Linux machines that make use of the polkit system service.
 The vulnerability enables an unprivileged local user to get a root shell on the system.
 
 ## Vulnerable Application
@@ -27,15 +27,15 @@ Download and install Ubuntu 20.04 from the Ubuntu Downloads page: https://ubuntu
 **SESSION**
 The session to run this module on.
 
-**WRITABLE_DIR**
-Directory to write file to (`%TEMP%` by default).
-
 **USERNAME**
 The name of the user the exploit will add to the system
 
 **PASSWORD**
 The password for the user to be created
 
+**WritableDir**
+Directory to write file to (`%TEMP%` by default).
+
 ## Scenarios
 
 ### Tested on Ubuntu 20.04