Update docs/web_reference.rst

Co-authored-by: Sviatoslav Sydorenko (Святослав Сидоренко) <wk.cvs.github@sydorenko.org.ua>

docs/web_reference.rst

@@ -953,7 +953,7 @@ and :ref:`aiohttp-web-signals` handlers::
                            connection if `pong` response is not
                            received. The timer is reset on any data reception.
 
-   :param float timeout: Timeout value for the `close`
+   :param float timeout: Timeout value for the ``close``
                          operation. After sending the close websocket message,
                          ``close`` waits for ``timeout`` seconds for a response.
                          Default value is ``10.0`` (10 seconds for ``close``