Adding information to format of caPool option (#17867)

* Adding information to format of caPool option

The current information for the caPool option is a bit vauge on what to actually enter here.

Added information provided by another CF Employee to the doc.

* Update origin-configuration.mdx

---------

Co-authored-by: ranbel <[email protected]>

Author: dledfordcf

src/content/docs/cloudflare-one/connections/connect-networks/configure-tunnels/origin-configuration.mdx

@@ -24,7 +24,7 @@ Hostname that `cloudflared` should expect from your origin server certificate. I
 | ------- | -------------------------- |
 | `""`    | Certificate Authority Pool |
 
-Path to the certificate authority (CA) for the certificate of your origin. This option should be used only if your certificate is not signed by Cloudflare.
+Local file path to the certificate authority (CA) for your origin server certificate (for example, `/root/certs/ca.pem`). The path should point to a certificate store file or a bundle file in `.pem` or `.crt` format that contains one or more trusted root CA certificates. You should only configure this setting if your certificate is not signed by Cloudflare.
 
 ### noTLSVerify