Generally available: AKS support for Ubuntu 22.04

Starting with Kubernetes 1.25 on Azure Kubernetes Service (AKS), the operating system AKS uses for Ubuntu based node pools will be changing from Ubuntu 18 to Ubuntu 22. [Learn more.](https://github.com/Azure/AKS/blob/master/CHANGELOG.md) * Azure Kubernetes Service (AKS) * Features * [ Azure Kubernetes Service (AKS)](https://azure.microsoft.com/en-gb/products/kubernetes-service/)