DOCSP-35814: renames connid64 type, removes old field in v2 (#342)

* DOCSP-35814: renames connid64 type, removes old field in v2

* whats new

* simplify wording

* MW PR fixes 1

* MW typo fix

Author: rustagir

source/fundamentals/monitoring/command-monitoring.txt

@@ -86,7 +86,6 @@ CommandStartedEvent
        "RequestID": ...,
        "ConnectionID": "...",
        "ServerConnectionID": ...,
-       "ServerConnectionID64": ...,
        "ServiceID": "..."
    }
 
@@ -104,7 +103,6 @@ CommandSucceededEvent
        "RequestID": 13,
        "ConnectionID": "...",
        "ServerConnectionID": ...,
-       "ServerConnectionID64": ...,
        "ServiceID": null,
        "Reply": "..."
    }
@@ -123,7 +121,6 @@ CommandFailedEvent
        "RequestID": 13,
        "ConnectionID": "...",
        "ServerConnectionID": ...,
-       "ServerConnectionID64": ...,
        "ServiceID": null,
        "Failure": "..."
    }

source/whats-new.txt

@@ -55,6 +55,19 @@ What's New in 2.0
    :ref:`Connection Example Code <go-connection-example-code>` in the
    Connection Guide.
 
+The 2.0 {+driver-short+} release includes the following improvements and fixes:
+
+- Updates to monitoring event documents:
+
+  - The ``CommandStartedEvent`` and ``CommandFinishedEvent`` structs
+    have a single ``ServerConnectionID`` field of type ``int64`` to
+    capture the connection ID.
+    
+  - The ``ConnectionID`` field of the ``PoolEvent``
+    struct takes a value of type ``int64`` instead of ``uint64``.
+
+  To view sample event documents, see the :ref:`golang-monitoring` guides.
+
 .. _version-1.13:
 
 What's New in 1.13