Add client certificate patterns to the doc

Author: mmacvicar

docs/src/api/params.md

@@ -567,7 +567,7 @@ Does not enforce fixed viewport, allows resizing window in the headed mode.
 
 ## context-option-clientCertificates
 - `clientCertificates` <[Array]<[Object]>>
-  - `origin` <[string]> Exact origin that the certificate is valid for. Origin includes `https` protocol, a hostname and optionally a port.
+  - `origin` <[string]> Exact origin or chromium enterprise policy style URL pattern that the certificate is valid for. Origin includes `https` protocol, a hostname and optionally a port.
   - `certPath` ?<[path]> Path to the file with the certificate in PEM format.
   - `cert` ?<[Buffer]> Direct value of the certificate in PEM format.
   - `keyPath` ?<[path]> Path to the file with the private key in PEM format.