Change Ubuntu22.04 image

Change-Id: I87f9b50e25a1e817c8d43ee16cc02270a2346805
diff --git a/nodepool/nodepool.yaml b/nodepool/nodepool.yaml
index 921d567..01bea13 100644
--- a/nodepool/nodepool.yaml
+++ b/nodepool/nodepool.yaml
@@ -66,7 +66,7 @@
         image-name: Ubuntu20.04-iSCSI
         username: ubuntu
       - name: os-ubuntu2204
-        image-name: Ubuntu22.04-iSCSI
+        image-name: Ubuntu22.04-Nodepool
         username: ubuntu
     pools:
       - name: main