Removed the part of the sentence that says that default values must not overlap the values for a bucket.

Author: Irene Smith

source/includes/apiargs-pipeline-bucket-field.yaml

@@ -61,9 +61,8 @@ description: |
    ``groupBy`` expression to a value within one of the bucket ranges 
    specified by ``boundaries`` or the operation throws an error.
 
-   The ``default`` value cannot overlap with a bucket; i.e. must
-   be less than the lowest ``boundaries`` value or greater than the
-   highest ``boundaries`` value.
+   The ``default`` value must be less than the lowest ``boundaries``
+   value, or greater than or equal to the highest ``boundaries`` value.
    
    The ``default`` value can be of a different
    :doc:`type </reference/bson-types>` than the entries in