updated compatibility matrix for 1.23.3b1

Author: yliaog

README.md

@@ -92,7 +92,7 @@ supported versions of Kubernetes clusters.
 - [client 20.y.z](https://pypi.org/project/kubernetes/20.13.0/): Kubernetes 1.19 or below (+-), Kubernetes 1.20 (✓), Kubernetes 1.21 or above (+-)
 - [client 21.y.z](https://pypi.org/project/kubernetes/21.7.0/): Kubernetes 1.20 or below (+-), Kubernetes 1.21 (✓), Kubernetes 1.22 or above (+-)
 - [client 22.y.z](https://pypi.org/project/kubernetes/22.6.0/): Kubernetes 1.21 or below (+-), Kubernetes 1.22 (✓), Kubernetes 1.23 or above (+-)
-- [client 23.y.z](https://pypi.org/project/kubernetes/23.3.0a1/): Kubernetes 1.22 or below (+-), Kubernetes 1.23 (✓), Kubernetes 1.24 or above (+-)
+- [client 23.y.z](https://pypi.org/project/kubernetes/23.3.0b1/): Kubernetes 1.22 or below (+-), Kubernetes 1.23 (✓), Kubernetes 1.24 or above (+-)
 
 > See [here](#homogenizing-the-kubernetes-python-client-versions) for an explanation of why there is no v13-v16 release.