DOCS-14134 fix positional projection array behavior

Author: andf-mongodb

source/reference/operator/projection/positional.txt

@@ -17,9 +17,9 @@ Definition
 
 
    The positional :projection:`$` operator limits the contents of an
-   ``<array>`` from the query results to contain only the **first** element
-   matching the query document. To specify an array element to update, see the
-   :doc:`positional $ operator for updates
+   ``<array>`` to return the first element that matches the query
+   condition on the array. To specify an array element to update, see
+   the :doc:`positional $ operator for updates
    </reference/operator/update/positional>`.
 
    Use :projection:`$` in the :term:`projection` document of the