DOCSP-20407: fix language (#319)

* DOCSP-20407: fix language

Author: Chris Cho

conf.py

@@ -1,6 +1,6 @@
 define: prefix docs/drivers/node
 define: base https://www.mongodb.com/${prefix}
-define: versions v3.6 v3.7 v4.0 v4.1 v4.2 v4.3 v4.4 master
+define: versions v3.6 v3.7 v4.0 v4.1 v4.2 v4.3 v4.4 v4.5 master
 
 raw: ${prefix}/ -> ${base}/current/
 raw: ${prefix}/stable -> ${base}/current/

config/build_conf.yaml

@@ -67,15 +67,15 @@ You can subscribe to any of the following SDAM events:
        primary or a **mongos** proxy disconnecting.
 
    * - ``serverHeartbeatStarted``
-     - Created prior to issuing an ``isMaster`` command to a MongoDB instance.
+     - Created prior to issuing a ``hello`` command to a MongoDB instance.
 
    * - ``serverHeartbeatSucceeded``
-     - Created when the ``isMaster`` command returns successfully from a
+     - Created when the ``hello`` command returns successfully from a
        MongoDB instance.
 
    * - ``serverHeartbeatFailed``
-     - Created when an ``isMaster`` command issued to a specific MongoDB
-       instance fails to return a successful response
+     - Created when a ``hello`` command issued to a specific MongoDB
+       instance fails to return a successful response.
 
 Example Event Documents
 -----------------------
@@ -186,7 +186,7 @@ serverHeartbeatSucceeded
        hosts: [ 'localhost:27017' ],
        setName: 'rs',
        setVersion: 1,
-       ismaster: true,
+       isWritablePrimary: true,
        secondary: false,
        primary: 'localhost:27017',
        me: 'localhost:27017',