add opnsense to default-passwords

Author: khicks

Passwords/Default-Credentials/default-passwords.csv

@@ -1720,6 +1720,7 @@ OCE,<N/A>,0 and the number of OCE printer,
 ODS,ods,ods,
 OMRON,<N/A>,<BLANK>,
 OPEN Networks,root,0P3N,
+OPNsense,root,opnsense,
 OSMC,osmc,osmc,
 OTRS Inc.,root@localhost,root,http://doc.otrs.org/2.4/en/html/c444.html
 Oki,admin,<SEE COMMENT>,Last 6 characters of the MAC address in uppercase

Passwords/Default-Credentials/default-passwords.txt

@@ -1305,4 +1305,5 @@ pepino
 xd
 alphaadmin
 alphacom
-1851
+1851
+opnsense