.github: test against Kubernetes 1.22

Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>

Author: dgrisonnet

.github/workflows/ci.yaml

@@ -4,7 +4,7 @@ on:
   - pull_request
 env:
   golang-version: '1.15'
-  kind-version: 'v0.11.0'
+  kind-version: 'v0.11.1'
 jobs:
   generate:
     runs-on: ${{ matrix.os }}
@@ -52,8 +52,9 @@ jobs:
     strategy:
       matrix:
         kind-image:
-          - 'kindest/node:v1.20.0'
+          - 'kindest/node:v1.20.7'
           - 'kindest/node:v1.21.1'
+          - 'kindest/node:v1.22.0'
     steps:
     - uses: actions/checkout@v2
       with:

README.md

@@ -106,13 +106,13 @@ $ minikube addons disable metrics-server
 
 The following versions are supported and work as we test against these versions in their respective branches. But note that other versions might work!
 
-| kube-prometheus stack                                                                            | Kubernetes 1.18 | Kubernetes 1.19 | Kubernetes 1.20 | Kubernetes 1.21 |
-|--------------------------------------------------------------------------------------------------|-----------------|-----------------|-----------------|-----------------|
-| [`release-0.5`](https://github.com/prometheus-operator/kube-prometheus/tree/release-0.5)         | ✔               | ✗               | ✗               | ✗               |
-| [`release-0.6`](https://github.com/prometheus-operator/kube-prometheus/tree/release-0.6)         | ✗               | ✔               | ✗               | ✗               |
-| [`release-0.7`](https://github.com/prometheus-operator/kube-prometheus/tree/release-0.7)         | ✗               | ✔               | ✔               | ✗               |
-| [`release-0.8`](https://github.com/prometheus-operator/kube-prometheus/tree/release-0.8)         | ✗               | ✗               | ✔               | ✔               |
-| [`HEAD`](https://github.com/prometheus-operator/kube-prometheus/tree/main)                       | ✗               | ✗               | ✔               | ✔               |
+| kube-prometheus stack                                                                    | Kubernetes 1.18 | Kubernetes 1.19 | Kubernetes 1.20 | Kubernetes 1.21 | Kubernetes 1.22 |
+|------------------------------------------------------------------------------------------|-----------------|-----------------|-----------------|-----------------|-----------------|
+| [`release-0.5`](https://github.com/prometheus-operator/kube-prometheus/tree/release-0.5) | ✔               | ✗               | ✗               | ✗               | ✗               |
+| [`release-0.6`](https://github.com/prometheus-operator/kube-prometheus/tree/release-0.6) | ✗               | ✔               | ✗               | ✗               | ✗               |
+| [`release-0.7`](https://github.com/prometheus-operator/kube-prometheus/tree/release-0.7) | ✗               | ✔               | ✔               | ✗               | ✗               |
+| [`release-0.8`](https://github.com/prometheus-operator/kube-prometheus/tree/release-0.8) | ✗               | ✗               | ✔               | ✔               | ✗               |
+| [`HEAD`](https://github.com/prometheus-operator/kube-prometheus/tree/main)               | ✗               | ✗               | ✔               | ✔               | ✔               |
 
 ## Quickstart