Add k8s 1.23.5 image (#627)

Author: mkumatag

docs/book/src/machine-images/powervs.md

@@ -3,7 +3,9 @@
 
 | Region   | Bucket           | Object                                                          | Kubernetes Version |
 |----------|------------------|-----------------------------------------------------------------|--------------------|
+| us-south | power-oss-bucket | [capibm-powervs-centos-streams8-1-23-5.ova.gz][streams8-1-23-5] | 1.23.5             |
 | us-south | power-oss-bucket | [capibm-powervs-centos-streams8-1-22-4.ova.gz][streams8-1-22-4] | 1.22.4             |
 
 
-[streams8-1-22-4]: https://power-oss-bucket.s3.us-south.cloud-object-storage.appdomain.cloud/capibm-powervs-centos-streams8-1-22-4.ova.gz
+[streams8-1-23-3]: https://power-oss-bucket.s3.us-south.cloud-object-storage.appdomain.cloud/capibm-powervs-centos-streams8-1-23-5.ova.gz
+[streams8-1-22-4]: https://power-oss-bucket.s3.us-south.cloud-object-storage.appdomain.cloud/capibm-powervs-centos-streams8-1-22-4.ova.gz