Revert "fix: Update apiVersion for Ingress" (#2068)

This reverts commit 175319d.

Author: kishorj

docs/examples/2048/2048_full.yaml

@@ -40,7 +40,7 @@ spec:
  selector:
  app.kubernetes.io/name: app-2048
 ---
-apiVersion: networking.k8s.io/v1
+apiVersion: networking.k8s.io/v1beta1
 kind: Ingress
 metadata:
  namespace: game-2048