DOCSP-17133 update FAQ (#115)

* updated pojo first question

Author: kyuan-mongodb

source/faq.txt

@@ -47,16 +47,7 @@ POJOs
 Do I have to specify an ID field value myself?
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-Imagine you have the following entity:
-
-.. code-block:: java
-
-   public class Entity {
-      public final ObjectId id;
-      public String value;
-
-      public Entity(){ }
-   }
+No, the ``PojoCodecProvider`` automatically generates an ObjectId.
 
 Can the ID field be a compound key?
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -77,7 +68,7 @@ document (in case you embed sub-documents).
 
 For example, if you have an ``Event`` class, that you extend in Java (e.g.
 ``MachineEvent`` or ``NetworkEvent``), using the discriminator identifies
-which class the ``PojoCodec`` should use to serialize/deserialize the
+which class the ``PojoCodecProvider`` should use to serialize/deserialize the
 document. 
 
 Can I control serialization of ``LocalDate``?