(DOCSP-33389) Warns users they need to use TLS with SANS. (#263)

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- [DOCSP-33389](https://jira.mongodb.org/browse/DOCSP-33389)
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[STAGING](https://preview-mongodberabilmdb.gatsbyjs.io/ops-manager/DOCSP-33389/tutorial/enable-ssl-for-a-deployment/#get-and-install-the-tls-certificate-on-each-mongodb-host)

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Author: erabil-mdb

source/tutorial/enable-ssl-for-a-deployment.txt

@@ -36,6 +36,14 @@ This certificate must include the |fqdn| for the hostname of this
 MongoDB host. The |fqdn| must be the Subject Alternative Name of this 
 host. You must install this |tls| certificate on the MongoDB host.
 
+.. warning::
+
+   The {+mdbagent+} from version 11.12.0.7384 requires that |tls|
+   certificates include a value in the Subject Alternative Name
+   field. Before upgrading to 11.12.0.7384, ensure that all |tls|
+   certificates used in your MongoDB deployment contain a |san-dns|.
+   To learn more, see :ref:`tls-cert-no-san`.
+
 Procedures
 ----------