update reference and classification

http/default-logins/webmin-default-login.yaml

@@ -4,8 +4,13 @@ info:
   name: Webmin - Default Login
   author: pussycat0x
   severity: high
+  description: |
+    Webmin default login credentials were discovered.
   reference:
     - https://webmin.com/
+    - https://doxfer.webmin.com/Webmin/Installing_Webmin
+  classification:
+    cwe-id: CWE-798
   metadata:
     max-request: 2
     verified: true