chore: update versions in README and kustomization.yaml

Signed-off-by: Jayapriya Pai <janantha@redhat.com>

Author: slashpai

README.md

@@ -72,6 +72,7 @@ Installation instructions for previous releases can be found in [Metrics Server
 
 Metrics Server | Metrics API group/version | Supported Kubernetes version
 ---------------|---------------------------|-----------------------------
+0.8.x          | `metrics.k8s.io/v1beta1`  | 1.19+
 0.7.x          | `metrics.k8s.io/v1beta1`  | 1.19+
 0.6.x          | `metrics.k8s.io/v1beta1`  | 1.19+
 0.5.x          | `metrics.k8s.io/v1beta1`  | *1.8+
@@ -150,7 +151,7 @@ Most useful flags:
 You can get a full list of Metrics Server configuration flags by running:
 
 ```shell
-docker run --rm registry.k8s.io/metrics-server/metrics-server:v0.7.0 --help
+docker run --rm registry.k8s.io/metrics-server/metrics-server:v0.8.0 --help
 ```
 
 ## Design

manifests/components/release/kustomization.yaml

@@ -3,4 +3,4 @@ kind: Component
 images:
 - name: gcr.io/k8s-staging-metrics-server/metrics-server
   newName: registry.k8s.io/metrics-server/metrics-server
-  newTag: v0.7.0
+  newTag: v0.8.0