docs(dialogflow/cx): A comment for field name in message .google.cloud.dialogflow.cx.v3beta1.Tool is changed (#11797)

- [ ] Regenerate this pull request now.

docs(dialogflow/cx): A comment for field `cert` in message `.google.cloud.dialogflow.cx.v3beta1.Tool` is changed

PiperOrigin-RevId: 735383878

Source-Link: https://togithub.com/googleapis/googleapis/commit/15f9d8b4bed004f8f050c94ff67e44d235c86aa6

Source-Link: https://togithub.com/googleapis/googleapis-gen/commit/89cf88875178837e320725b3d7ad516b4ce0894e
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Author: gcf-owl-bot[bot]