(DOCSP-33221): Added release dates.

Author: corryroot

source/atlas-cli-changelog.txt

@@ -19,6 +19,8 @@
 {+atlas-cli+} 1.12.0
 --------------------
 
+Released 22 September 2023
+
 - Adds :ref:`atlas-deployments` commands so that you can work with
   |service|, including using :atlas:`Atlas Search </atlas-search>` and 
   :atlas:`{+avs+} </atlas-search/field-types/knn-vector>`, throughout 
@@ -34,6 +36,8 @@
 {+atlas-cli+} 1.11.0
 --------------------
 
+Released 14 September 2023
+
 - Fixes an issue that occurred when you created x509 certs for database 
   users. The command didn't output the certificate. If you depend on 
   the previously incorrect output, this update is a breaking change.