bug: keyauth header in ApisixRoute CRD doesnt work

[akalittle]

Issue description

Follow the doc in ApisixRoute CRD

apiVersion: apisix.apache.org/v2beta3
kind: ApisixRoute
metadata:
  name: status-tracker
  namespace: launcher
spec:
  http:
    - name: status-tracker-rule
      match:
        hosts:
          - api.xxx.cc
        paths:
          - /status-tracker*
      plugins:
        - name: proxy-rewrite
          enable: true
          config:
            regex_uri:
              - ^/status-tracker/(.*)
              - /$1
      backends:
        - serviceName: status-tracker
          servicePort: 8000
      authentication:
        enable: true
        type: keyAuth
        keyAuth:
          header: Authentication

Environment

apache/apisix-ingress-controller:1.4.1

Kubernetes cluster version: Client Version: v1.24.0 Kustomize Version: v4.5.4 Server Version: v1.21.12-gke.2200

Minimal test code / Steps to reproduce

kubectl apply -f the config file

Actual result

Error log

no

Expected result

the keyAuth header need to be Authentication

[tao12345666333]

we can add a test case to cover this one. WDYT @AlinsRan @lingsamuel

[github-actions[bot]]

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[github-actions[bot]]

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