DOCSP-35287 Fix incorrect BSON option (#329)

(cherry picked from commit bacbc5f)

Author: jordan-smith721

source/fundamentals/bson.txt

@@ -4,14 +4,19 @@
 Work with BSON
 ==============
 
-.. default-domain:: mongodb
-
 .. contents:: On this page
    :local:
    :backlinks: none
    :depth: 2
    :class: singlecol
 
+.. facet::
+   :name: genre
+   :values: reference
+
+.. meta::
+   :keywords: code examples, serialization 
+
 Overview
 --------
 
@@ -219,7 +224,7 @@ This example performs the following actions:
 
   - Sets the ``UseJSONStructTags`` field to ``true``, which instructs the driver
     to use the ``"json"`` struct tag if a ``"bson"`` struct tag is not specified
-  - Sets the ``OmitZeroStruct`` field to ``true``, which instructs the driver
+  - Sets the ``NilSliceAsEmpty`` field to ``true``, which instructs the driver
     to marshal ``nil`` Go slices as empty BSON arrays
 
 - Passes the ``BSONOptions`` instance to the ``SetBSONOptions()`` helper method to specify
@@ -230,7 +235,7 @@ This example performs the following actions:
 
    bsonOpts := &options.BSONOptions {
        UseJSONStructTags: true,
-       OmitZeroStruct: true,
+       NilSliceAsEmpty: true,
    }
 
    clientOpts := options.Client().