DOCSP-50088 Security checklist metadata compaction (#12031)

* Draft wording

* removed unnecessary ref

* Wording

* Copy edit

* Review feedback

Author: nvillahermosa-mdb

source/administration/security-checklist.txt

@@ -226,6 +226,10 @@ Periodic/Ongoing Production Checks
 
   - Review MongoDB database users and periodically rotate them.
 
+- If you're using {+qe+}, compact the metadata collections as directed in
+  :ref:`Scheduling Metadata Compaction <qe-metadata-compaction>` to reduce
+  storage space.
+
 Report Suspected Security Bugs
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