docs: Clarify the meaning of WARN state (#430)

* docs: Clarify the meaning of WARN state

* Update README.md

README.md

@@ -170,9 +170,15 @@ There are three output states
 - [WARN] means this test needs further attention, for example it is a test that needs to be run manually 
 - [INFO] is informational output that needs no further action.
 
+Note:
+- If the test is Manual, this always generates WARN (because the user has to run it manually)
+- If the test is Scored, and kube-bench was unable to run the test, this generates FAIL (because the test has not been passed, and as a Scored test, if it doesn't pass then it must be considered a failure).
+- If the test is Not Scored, and kube-bench was unable to run the test, this generates WARN.
+- If the test is Scored, type is empty, and there are no `test_items` present, it generates a WARN.
+
 ## Configuration
 
-Kubernetes config and binary file locations and names can vary from installation to installation, so these are configurable in the `cfg/config.yaml` file.
+Kubernetes configuration and binary file locations and names can vary from installation to installation, so these are configurable in the `cfg/config.yaml` file.
 
 Any settings in the version-specific config file `cfg/<version>/config.yaml` take precedence over settings in the main `cfg/config.yaml` file.