DOCSP-12263 default time for KeepAliveInitialDelay (#170)

* updated default time for KeepAliveInitialDelay

Author: kyuan-mongodb

source/fundamentals/connection.txt

@@ -142,7 +142,7 @@ URI to specify the behavior of the client.
 
    * - **keepAliveInitialDelay**
      - integer
-     - ``30000``
+     - ``120000``
      - Specifies the number of milliseconds to wait before initiating
        ``keepAlive`` on the TCP socket. For more information, see the
        documentation for `Node.js socket.setKeepAlive