[hotfix][docs] Fix Readme Description for the State Machine Example (a…

…pache#11046)

flink-examples/flink-examples-streaming/src/main/java/org/apache/flink/streaming/examples/statemachine/README.md

@@ -16,7 +16,7 @@ should trigger an alert.
 
 You can, for example, think of events as being generated by network devices and services,
 such as firewalls login-, and registration with an authentication service, etc. A deviation
-from expected the expected pattern might indicate an intrusion detection.
+from the expected pattern might indicate an intrusion detection.
 
 The event patterns are tracked per interacting party (here simplified per source IP address)
 and are validated by a state machine. The state machine's states define what possible