fix: update Authelia template with valid password hash

- Replace CHANGEME placeholder with proper argon2 hash
- Default password is 'admin123' for initial setup
- Prevents argon2 decode errors on first startup

config-templates/authelia/users_database.yml

@@ -5,7 +5,7 @@
 users:
   admin:
     displayname: "Admin User"
-    password: "$argon2id$v=19$m=65536,t=3,p=4$CHANGEME"  # Replace with your hashed password
+    password: "$argon2id$v=19$m=65536,t=3,p=4$GABqY9zhf83XWZQM5B8vlg$ADtVApDgotqKUb/sefku8hMYwRBDr5rqKIAuFghKzrM"  # Default password: admin123
     email: admin@example.com
     groups:
       - admins