Update doc

Author: wchen-r7

documentation/modules/exploit/linux/http/cisco_firepower_useradd.md

@@ -24,12 +24,12 @@ https://software.cisco.com/download/release.html?mdfid=286259687&softwareid=2862
 
 ## Options
 
-*USERNAME* The username for Cisco Firepower Management console
+**USERNAME** The username for Cisco Firepower Management console
 
-*Password* The password for Cisco Firepower Management cosnole
+**Password** The password for Cisco Firepower Management cosnole
 
-*NEWSSHUSER* The SSH account to create. By default, this is random.
+**NEWSSHUSER** The SSH account to create. By default, this is random.
 
-*NEWSSHPASS* The SSH password for the new account. By default, this is also random.
+**NEWSSHPASS** The SSH password for the new account. By default, this is also random.
 
-*SSHPORT* In case for some reason, the SSH changed, otherwise this is 22 by default.
+**SSHPORT** In case for some reason, the SSH changed, otherwise this is 22 by default.