feat: update clients with smithy models as of 08/20 (#1457)

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

Author: trivikr

clients/client-acm-pca/models/index.ts

@@ -232,11 +232,10 @@ export class ACM extends ACMClient {
   }
 
   /**
-   * <p>Retrieves a certificate specified by an ARN and its certificate chain . The chain is an
-   *       ordered list of certificates that contains the end entity certificate, intermediate
-   *       certificates of subordinate CAs, and the root certificate in that order. The certificate and
-   *       certificate chain are base64 encoded. If you want to decode the certificate to see the
-   *       individual fields, you can use OpenSSL.</p>
+   * <p>Retrieves an Amazon-issued certificate and its certificate chain. The chain consists of
+   *       the certificate of the issuing CA and the intermediate certificates of any other subordinate
+   *       CAs. All of the certificates are base64 encoded. You can use <a href="https://wiki.openssl.org/index.php/Command_Line_Utilities">OpenSSL</a> to decode
+   *       the certificates and inspect individual fields.</p>
    */
   public getCertificate(
     args: GetCertificateCommandInput,