DOCSP-39860: Read/write concern helper methods (#121)

Author: norareidy

source/fundamentals/gridfs.txt

@@ -144,17 +144,18 @@ fields:
      - Specifies the chunk size used to break the file into chunks, which is 255 KB by default
 
    * - | ``write_concern()``
-     - | ``WriteConcern::w``,
-       | ``WriteConcern::w_timeout``,
-       | ``WriteConcern::journal``
+     - | ``WriteConcern::w()``,
+       | ``WriteConcern::w_timeout()``,
+       | ``WriteConcern::journal()``,
+       | ``WriteConcern::majority()``
      - | Specifies the bucket's write concern, which is set to the database's write concern by default
 
    * - ``read_concern()``
-     - ``ReadConcernLevel::Local``,
-       ``ReadConcernLevel::Majority``,
-       ``ReadConcernLevel::Linearizable``,
-       ``ReadConcernLevel::Available``,
-       ``ReadConcernLevel::Snapshot``
+     - ``ReadConcern::local()``,
+       ``ReadConcern::majority()``,
+       ``ReadConcern::linearizable()``,
+       ``ReadConcern::available()``,
+       ``ReadConcern::snapshot()``
      - Specifies the bucket's read concern, which is set to the database's read concern by default
 
    * - | ``selection_criteria()``