Add small fix

Author: xuniq

doc/reference/reference_rock/vshard/vshard_router.rst

@@ -137,7 +137,7 @@ Router public API
           It is necessary to pass the ``request_timeout`` and ``timeout`` parameters together, with the following requirement:
           ``timeout > request_timeout``.
 
-          The ``timeout`` parameter controls how much time a single request attempt may take.
+          The ``request_timeout`` parameter controls how much time a single request attempt may take.
           When this time is over (the ``TimedOut`` error is raised), the router retries this request on the next replica as long
           as the ``timeout`` value is not elapsed.
 
@@ -221,7 +221,7 @@ Router public API
         * ``request_timeout`` (since ``vshard`` 0.1.28) — timeout in seconds that serves as a protection against hung replicas.
           It is necessary to pass the ``request_timeout`` and ``timeout`` parameters together, with the following requirement:
           ``timeout > request_timeout``.
-          The ``timeout`` parameter controls how much time a single request attempt may take.
+          The ``request_timeout`` parameter controls how much time a single request attempt may take.
           When this time is over (the ``TimedOut`` error is raised), the router retries this request on the next replica as long
           as the ``timeout`` value is not elapsed.
 
@@ -300,7 +300,7 @@ Router public API
         * ``request_timeout`` (since ``vshard`` 0.1.28) — timeout in seconds that serves as a protection against hung replicas.
           It is necessary to pass the ``request_timeout`` and ``timeout`` parameters together, with the following requirement:
           ``timeout > request_timeout``.
-          The ``timeout`` parameter controls how much time a single request attempt may take.
+          The ``request_timeout`` parameter controls how much time a single request attempt may take.
           When this time is over (the ``TimedOut`` error is raised), the router retries this request on the next replica as long
           as the ``timeout`` value is not elapsed.