DOCSP-45707 -- replace tabs with placeholder-v8.0-backport (568) (#621)

# Backport

This will backport the following commits from `master` to `v8.0`:
- [DOCSP-45707 -- replace tabs with placeholder
(#568)](10gen/docs-ops-manager#568)

<!--- Backport version: 9.6.1 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sorenlouv/backport)

Author: jvincent-mongodb

source/includes/steps-upgrade-on-prem-with-rpm-packages.yaml

@@ -75,35 +75,21 @@ content: |
 
   To complete the upgrade:
 
-  a. Issue the following commands to move the old ``init`` files:
+  a. Replace the ``<old-version>`` placeholder and run the following commands to move the old ``init`` files:
 
-     .. tabs::
-
-        .. tab:: Upgrading to 6.0
-           :tabid: upgrade-6
-
-           .. code-block:: sh
-
-              sudo mv /etc/init.d/mongodb-mms /etc/init.d/mongodb-mms-5.0
-              sudo mv /etc/init.d/mongodb-mms-backup-daemon /etc/init.d/mongodb-mms-backup-daemon-5.0
-
-        .. tab:: Upgrading to 7.0
-           :tabid: upgrade-7
-     
-           .. code-block:: sh
+     .. code-block:: sh
 
-              sudo mv /etc/init.d/mongodb-mms /etc/init.d/mongodb-mms-6.0
-              sudo mv /etc/init.d/mongodb-mms-backup-daemon /etc/init.d/mongodb-mms-backup-daemon-6.0
+        sudo mv /etc/init.d/mongodb-mms /etc/init.d/mongodb-mms-<old_version>
+        sudo mv /etc/init.d/mongodb-mms-backup-daemon /etc/init.d/mongodb-mms-backup-daemon-<old_version>
 
-  #. Issue the following commands to symbolically link the |onprem|
+  b. Run the following commands to symbolically link the |onprem|
      files to their ``init`` files:
 
      .. code-block:: sh
 
         sudo ln -s /opt/mongodb/mms/bin/mongodb-mms /etc/init.d/mongodb-mms
         sudo ln -s /opt/mongodb/mms/bin/mongodb-mms-backup-daemon /etc/init.d/mongodb-mms-backup-daemon
 
-
 ---
 stepnum: 5
 level: 4