[SSL] Google as USSL CA (#4881)

* Added google as a CA

* Added google as a universal CA

content/ssl/edge-certificates/advanced-certificate-manager/_index.md

@@ -18,7 +18,7 @@ Advanced certificates allow you multiple customization options:
 *   Cover more than one level of subdomain.
 *   Select the preferred validation method (HTTP, TXT, or Email).
 *   Choose the certificate validity period (14, 30, 90, or 365 days).
-*   Choose the Certificate Authority to issue the certificate (Let’s Encrypt or Digicert).
+*   Choose the Certificate Authority to issue the certificate.
 *   Remove Cloudflare branding that are normally present on Universal certificates.
 *   Select a custom trust store for origin authentication.
 *   Control [cipher suites used for TLS](/ssl/ssl-tls/cipher-suites/#disable-cipher-suites).

content/ssl/edge-certificates/universal-ssl/limitations.md

@@ -30,3 +30,9 @@ For more on browser support, see [Browser compatibility](/ssl/ssl-tls/browser-co
 ## Spectrum
 
 Universal SSL is not compatible with [Cloudflare Spectrum](/spectrum/). If you are trying to use Spectrum, use either [an advanced certificate](/ssl/edge-certificates/advanced-certificate-manager/) or [a custom certificate](/ssl/edge-certificates/custom-certificates/).
+
+## Certificate authority
+
+For Universal SSL certificates, Cloudflare chooses the [certificate authority](/ssl/ssl-tls/certificate-authorities/) used for your certificate.
+
+If you want to choose the issuing certificate authority, [order an advanced certificate](/ssl/edge-certificates/advanced-certificate-manager/).

content/ssl/ssl-tls/certificate-authorities.md

@@ -11,6 +11,7 @@ Cloudflare may issue certificates for SSL products from any of the following Cer
 - DigiCert
 - GlobalSign
 - Let’s Encrypt
+- Google Trust Services
 - Sectigo (formerly Comodo)
 
 ## Backup certificates