update cert injection annotations to beta

[lance5890]

• the serving-cert-secret description can be found in https://docs.redhat.com/en/documentation/openshift_container_platform/4.21/html/security_and_compliance/configuring-certificates#add-service-certificate_service-serving-certificate
• this is the change of beta version in service ca operator : openshift/service-ca-operator@9820fea#diff-81a43fd4d98d3cb6bac44c7a083efc4f5ad81887646dce6ea0c744dc786369b7
• this is kind of clean up

[openshift-ci]

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[openshift-ci]

Hi @lance5890. Thanks for your PR.

I'm waiting for a openshift member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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