add api links

Author: rustagir

source/fundamentals/builders/vector-search.txt

@@ -103,4 +103,4 @@ guide, see the following API documentation:
 - `Projections.metaVectorSearchScore()
   <{+api+}/apidocs/mongodb-driver-core/com/mongodb/client/model/Projections.html#metaVectorSearchScore(java.lang.String)>`__
 
-.. TODO add BinaryVector API link
+- `BinaryVector <{+api+}/apidocs/bson/org/bson/BinaryVector.html>`__