[ trivial ] fix reference to recent upgrade docs version

Author: andf-mongodb

source/includes/extracts-enterprise.yaml

@@ -19,8 +19,8 @@ content: |
 
    Do not use these instructions to upgrade to another release version.
    To upgrade release versions, refer to the appropriate release
-   upgrade instructions, such as :ref:`Upgrade to MongoDB 4.2
-   <4.2-upgrade>`.
+   upgrade instructions, such as :ref:`Upgrade to MongoDB 4.4
+   <4.4-upgrade>`.
 ---
 ref: enterprise-install-binaries
 content: |