Update certificate-authority-server-production.mdx

Name of feature:

Change of tls trust definition for proxying step-ca traffic. Use of tls_trust_pool instead of tls_trusted_ca_certs.

Pain or issue this feature alleviates:

Inaccessibility of step-ca while proxying with caddy.

Why is this important to the project (if not answered above):

Is there documentation on how to use this feature? If so, where?

This is the documentation.

In what environments or workflows is this feature supported?

Any

In what environments or workflows is this feature explicitly NOT supported (if any)?

Supporting links/other PRs/issues:

💔Thank you!