README: update releases

Author: ingvagabund

README.md

@@ -10,6 +10,7 @@ Run the descheduler in your OpenShift cluster to move pods based on specific str
 | 5.0.1       | 4.15, 4.16  | 1.29        | 1.21   |
 | 5.0.2       | 4.15, 4.16  | 1.29        | 1.21   |
 | 5.1.0       | 4.17, 4.18  | 1.30        | 1.22   |
+| 5.1.1       | 4.17, 4.18  | 1.30        | 1.22   |
 
 ## Deploy the operator