fix broken link (#437)

Author: mongoKart

source/fundamentals/connection/connection-options.txt

@@ -294,5 +294,5 @@ parameters of the connection URI to specify the behavior of the client.
      - Specifies the level of compression when using zlib to compress wire
        protocol messages. ``-1`` signifies the default level, ``0`` signifies
        no compression, ``1`` signifies the fastest speed, and ``9`` signifies
-       the best compression. See :ref`node-network-compression` for more
+       the best compression. See :ref:`node-network-compression` for more information.