virustotal.md in mihari-5.6.0

- old
+ new

@@ -28,9 +28,13 @@
 api_key: ...
 ```
 
 ## Components
 
+### Analyzer
+
+`analyzer` (`string`) should be either of `virustoal` and `vt`.
+
 ### Query
 
 `query` (`string`) is a passive DNS search query. Domain or IP address.
 
 ### API Key