Change YAML files to reference the newer APIs (#8299)

docs/orchestration/kubernetes/minio-distributed-statefulset.yaml

@@ -1,4 +1,4 @@
-apiVersion: apps/v1beta1
+apiVersion: apps/v1
 kind: StatefulSet
 metadata:
   # This name uniquely identifies the StatefulSet

docs/orchestration/kubernetes/minio-gcs-gateway-deployment.yaml

@@ -1,9 +1,12 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   # This name uniquely identifies the Deployment
   name: minio-deployment
 spec:
+  selector:
+    matchLabels:
+      app: minio # has to match .spec.template.metadata.labels
   strategy:
     type: Recreate
   template:

docs/orchestration/kubernetes/minio-standalone-deployment.yaml

@@ -1,9 +1,12 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   # This name uniquely identifies the Deployment
   name: minio
 spec:
+  selector:
+    matchLabels:
+      app: minio # has to match .spec.template.metadata.labels
   strategy:
     # Specifies the strategy used to replace old Pods by new ones
     # Refer: https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#strategy