Backport of [DOCS]docs/Update cert.mdx into release/1.13.x

[hc-github-team-secure-vault-core]

Backport

This PR is auto-generated from #26165 to be assessed for backporting due to the inclusion of the label backport/1.13.x.

The below text is copied from the body of the original PR.

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Changed sample request for Configure TLS certificate method from auth/cert/certs/cert1 to auth/cert/config

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Overview of commits

• f3e6bf572f6265e3856583eb0c39f4a4c07018b6