Update docs and examples to HPA v2beta2

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

docs/gitbook/tutorials/appmesh-progressive-delivery.md

@@ -76,7 +76,7 @@ spec:
   progressDeadlineSeconds: 60
   # HPA reference (optional)
   autoscalerRef:
-    apiVersion: autoscaling/v2beta1
+    apiVersion: autoscaling/v2beta2
     kind: HorizontalPodAutoscaler
     name: podinfo
   service:

docs/gitbook/tutorials/contour-progressive-delivery.md

@@ -79,7 +79,7 @@ spec:
     name: podinfo
   # HPA reference
   autoscalerRef:
-    apiVersion: autoscaling/v2beta1
+    apiVersion: autoscaling/v2beta2
     kind: HorizontalPodAutoscaler
     name: podinfo
   service:

docs/gitbook/tutorials/crossover-progressive-delivery.md

@@ -142,7 +142,7 @@ spec:
   progressDeadlineSeconds: 60
   # HPA reference (optional)
   autoscalerRef:
-    apiVersion: autoscaling/v2beta1
+    apiVersion: autoscaling/v2beta2
     kind: HorizontalPodAutoscaler
     name: podinfo
   service:

docs/gitbook/tutorials/flagger-smi-istio.md

@@ -122,7 +122,7 @@ spec:
   progressDeadlineSeconds: 60
   # HPA reference (optional)
   autoscalerRef:
-    apiVersion: autoscaling/v2beta1
+    apiVersion: autoscaling/v2beta2
     kind: HorizontalPodAutoscaler
     name: podinfo
   service:

docs/gitbook/tutorials/gloo-progressive-delivery.md

@@ -97,7 +97,7 @@ spec:
     name: podinfo
   # HPA reference (optional)
   autoscalerRef:
-    apiVersion: autoscaling/v2beta1
+    apiVersion: autoscaling/v2beta2
     kind: HorizontalPodAutoscaler
     name: podinfo
   service:

docs/gitbook/tutorials/istio-ab-testing.md

@@ -86,7 +86,7 @@ spec:
   progressDeadlineSeconds: 60
   # HPA reference (optional)
   autoscalerRef:
-    apiVersion: autoscaling/v2beta1
+    apiVersion: autoscaling/v2beta2
     kind: HorizontalPodAutoscaler
     name: podinfo
   service:

docs/gitbook/tutorials/istio-progressive-delivery.md

@@ -87,7 +87,7 @@ spec:
   progressDeadlineSeconds: 60
   # HPA reference (optional)
   autoscalerRef:
-    apiVersion: autoscaling/v2beta1
+    apiVersion: autoscaling/v2beta2
     kind: HorizontalPodAutoscaler
     name: podinfo
   service:

docs/gitbook/tutorials/kubernetes-blue-green.md

@@ -87,7 +87,7 @@ spec:
   progressDeadlineSeconds: 60
   # HPA reference (optional)
   autoscalerRef:
-    apiVersion: autoscaling/v2beta1
+    apiVersion: autoscaling/v2beta2
     kind: HorizontalPodAutoscaler
     name: podinfo
   service:

docs/gitbook/tutorials/linkerd-progressive-delivery.md

@@ -57,7 +57,7 @@ spec:
     name: podinfo
   # HPA reference (optional)
   autoscalerRef:
-    apiVersion: autoscaling/v2beta1
+    apiVersion: autoscaling/v2beta2
     kind: HorizontalPodAutoscaler
     name: podinfo
   # the maximum time in seconds for the canary deployment
@@ -400,7 +400,7 @@ spec:
     kind: Deployment
     name: podinfo
   autoscalerRef:
-    apiVersion: autoscaling/v2beta1
+    apiVersion: autoscaling/v2beta2
     kind: HorizontalPodAutoscaler
     name: podinfo
   service:

docs/gitbook/tutorials/nginx-progressive-delivery.md

@@ -116,7 +116,7 @@ spec:
     name: podinfo
   # HPA reference (optional)
   autoscalerRef:
-    apiVersion: autoscaling/v2beta1
+    apiVersion: autoscaling/v2beta2
     kind: HorizontalPodAutoscaler
     name: podinfo
   # the maximum time in seconds for the canary deployment

docs/gitbook/tutorials/skipper-progressive-delivery.md

@@ -109,7 +109,7 @@ spec:
     name: podinfo
   # HPA reference (optional)
   autoscalerRef:
-    apiVersion: autoscaling/v2beta1
+    apiVersion: autoscaling/v2beta2
     kind: HorizontalPodAutoscaler
     name: podinfo
   # the maximum time in seconds for the canary deployment

docs/gitbook/tutorials/traefik-progressive-delivery.md

@@ -96,7 +96,7 @@ spec:
     name: podinfo
   # HPA reference (optional)
   autoscalerRef:
-    apiVersion: autoscaling/v2beta1
+    apiVersion: autoscaling/v2beta2
     kind: HorizontalPodAutoscaler
     name: podinfo
   # the maximum time in seconds for the canary deployment

docs/gitbook/tutorials/zero-downtime-deployments.md

@@ -139,7 +139,7 @@ Note that without resource requests the horizontal pod autoscaler can't determin
 A production environment should be able to handle traffic bursts without impacting the quality of service. This can be achieved with Kubernetes autoscaling capabilities. Autoscaling in Kubernetes has two dimensions: the Cluster Autoscaler that deals with node scaling operations and the Horizontal Pod Autoscaler that automatically scales the number of pods in a deployment.
 
 ```yaml
-apiVersion: autoscaling/v2beta1
+apiVersion: autoscaling/v2beta2
 kind: HorizontalPodAutoscaler
 spec:
   scaleTargetRef: