DOCSP-26834 defrag warning (#2223) (#2226)

* DOCSP-26834 Adds warning on defragmentCollection

* Updates warning text

* Updates warning text

Author: kennethdyer

source/reference/command/configureCollectionBalancing.txt

@@ -117,6 +117,13 @@ For more information, see :ref:`Chunk Size <sharding-chunk-size>`.
 Defragment Collections
 ~~~~~~~~~~~~~~~~~~~~~~
 
+.. warning:: 
+
+   We do not recommend using ``defragmentCollection`` to defragment sharded
+   collections for MongoDB 6.0.0 to 6.0.3 and MongoDB 6.1.0 to 6.1.1, as the
+   defragmentation process on these releases can make databases and collections
+   unavailable for extended periods of time.
+
 To tell the balancer to defragment a sharded collection, use the
 ``defragmentCollection`` option: