updated compatibility matrix and maintenance status in the README

Author: yliaog

README.md

@@ -100,6 +100,7 @@ supported versions of Kubernetes clusters.
 - [client 28.y.z](https://pypi.org/project/kubernetes/28.1.0/): Kubernetes 1.27 or below (+-), Kubernetes 1.28 (✓), Kubernetes 1.29 or above (+-)
 - [client 29.y.z](https://pypi.org/project/kubernetes/29.0.0/): Kubernetes 1.28 or below (+-), Kubernetes 1.29 (✓), Kubernetes 1.30 or above (+-)
 - [client 30.y.z](https://pypi.org/project/kubernetes/30.1.0/): Kubernetes 1.29 or below (+-), Kubernetes 1.30 (✓), Kubernetes 1.31 or above (+-)
+- [client 31.y.z](https://pypi.org/project/kubernetes/31.0.0/): Kubernetes 1.30 or below (+-), Kubernetes 1.31 (✓), Kubernetes 1.32 or above (+-)
 
 
 > See [here](#homogenizing-the-kubernetes-python-client-versions) for an explanation of why there is no v13-v16 release.
@@ -165,6 +166,7 @@ between client-python versions.
 | 29.0            | Kubernetes main repo, 1.29 branch    | ✓                             |
 | 30.0 Alpha/Beta | Kubernetes main repo, 1.30 branch    | ✗                             |
 | 30.0            | Kubernetes main repo, 1.30 branch    | ✓                             |
+| 31.0 Alpha/Beta | Kubernetes main repo, 1.31 branch    | ✓                             |
 
 > See [here](#homogenizing-the-kubernetes-python-client-versions) for an explanation of why there is no v13-v16 release.