DOCSP 33219 (#4803)

* DOCSP-33219 add descending index limitation

* empty commit

* DOCSP-33219 add descending index limitation

Author: ltran-mdb2

source/includes/limits-sharding-index-type.rst

@@ -1,11 +1,11 @@
 A :term:`shard key` index can be an ascending index on the shard
-key, a compound index that start with the shard key and specify
+key, a compound index that starts with the shard key and specifies
 ascending order for the shard key, or a :ref:`hashed index
 <index-type-hashed>`.
 
-A :term:`shard key` index cannot be an index that specifies a
-:ref:`multikey index <index-type-multikey>`, a :ref:`text index 
-<index-type-text>` or a :ref:`geospatial index
+A :term:`shard key` index cannot be a descending index on the shard key,
+an index that specifies a :ref:`multikey index <index-type-multikey>`, a
+:ref:`text index <index-type-text>` or a :ref:`geospatial index
 <index-feature-geospatial>` on the :term:`shard key` fields.
 
 .. COMMENT seealso extracts-geospatial-index-shard-key-restriction.yaml