[YUNIKORN-2868] update K8s versions in helm readme (#182)

Closes: #182

Signed-off-by: Peter Bacsko <bacskop@gmail.com>
diff --git a/helm-charts/yunikorn/README.md b/helm-charts/yunikorn/README.md
index b288456..da733b2 100644
--- a/helm-charts/yunikorn/README.md
+++ b/helm-charts/yunikorn/README.md
@@ -49,6 +49,8 @@
 | 1.27.x              |    √     |
 | 1.28.x              |    √     |
 | 1.29.x              |    √     |
+| 1.30.x              |    √     |
+| 1.31.x              |    √     |
 
 ## Installing the chart
 ```