DOCS-13975 Corrected NumberLong typo to NumberDouble (#6032)

Co-authored-by: Jocelyn Mendez <[email protected]>

Author: jocelyn-mendez1

source/reference/operator/aggregation/convert.txt

@@ -568,8 +568,8 @@ double:
 
    * - Boolean
 
-     - | Returns NumberLong(0) for  ``false``.
-       | Returns NumberLong(1) for ``true``.
+     - | Returns NumberDouble(0) for  ``false``.
+       | Returns NumberDouble(1) for ``true``.
 
    * - Double
      - No-op. Returns the double.