ci: change apiVersion of prow deployments from v1beta2 to v1 (#2669)

.prowci/deck.yaml

@@ -13,7 +13,7 @@ items:
     - port: 80
       targetPort: 8080
     type: ClusterIP
-- apiVersion: apps/v1beta2
+- apiVersion: apps/v1
   kind: Deployment
   metadata:
     name: deck

.prowci/hook.yaml

@@ -17,7 +17,7 @@ items:
     ports:
     - port: 8888
     type: ClusterIP
-- apiVersion: apps/v1beta2
+- apiVersion: apps/v1
   kind: Deployment
   metadata:
     name: hook

.prowci/tide.yaml

@@ -13,7 +13,7 @@ items:
     - port: 80
       targetPort: 8888
     type: ClusterIP
-- apiVersion: apps/v1beta2
+- apiVersion: apps/v1
   kind: Deployment
   metadata:
     name: tide