docs: improve options.strict description

lib/model.js

@@ -3481,7 +3481,7 @@ function _setIsNew(doc, val) {
  * @param {number} [options.wtimeout=null] The [write concern timeout](https://docs.mongodb.com/manual/reference/write-concern/#wtimeout).
  * @param {Boolean} [options.j=true] If false, disable [journal acknowledgement](https://docs.mongodb.com/manual/reference/write-concern/#j-option)
  * @param {Boolean} [options.bypassDocumentValidation=false] If true, disable [MongoDB server-side schema validation](https://docs.mongodb.com/manual/core/schema-validation/) for all writes in this bulk.
- * @param {Boolean} [options.strict=null] If true, overwrites the [`strict` option](/docs/guide.html#strict) on schema, and allows filtering and writing fields not defined in the schema for all writes in this bulk.
+ * @param {Boolean} [options.strict=null] Overwrites the [`strict` option](/docs/guide.html#strict) on schema. If false, allows filtering and writing fields not defined in the schema for all writes in this bulk.
  * @param {Function} [callback] callback `function(error, bulkWriteOpResult) {}`
  * @return {Promise} resolves to a [`BulkWriteOpResult`](http://mongodb.github.io/node-mongodb-native/3.1/api/Collection.html#~BulkWriteOpResult) if the operation succeeds
  * @api public