Update modbus_controller.rst (#2817)

I think at some time in the past the 'command_throttle' parameter changed from a unit of 'milliseconds' to the unit of 'time'.

If you try to compile with a value of 1000 (supposedly milliseconds), compilation fails with the following error:
```
    Don't know what '1000' means as it has no time *unit*! Did you mean '1000s'?.
    command_throttle: 1000
```
If I put a value of '1s' then compilation works and also this is the time I see that is being used.
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victorclaessen 2023-04-12 11:43:11 +02:00 committed by GitHub
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@ -53,7 +53,7 @@ Configuration variables:
- **address** (**Required**, :ref:`config-id`): The modbus address of the device - **address** (**Required**, :ref:`config-id`): The modbus address of the device
Specify the modbus device address of the. Specify the modbus device address of the.
- **command_throttle** (*Optional*, int): minimum time in milliseconds between 2 requests to the device. Default is 0ms - **command_throttle** (*Optional*, :ref:`config-time`): minimum time in between 2 requests to the device. Default is 0ms
Because some modbus devices limit the rate of requests the interval between sending requests to the device can be modified. Because some modbus devices limit the rate of requests the interval between sending requests to the device can be modified.
- **update_interval** (*Optional*, :ref:`config-time`): The interval that the sensors should be checked. - **update_interval** (*Optional*, :ref:`config-time`): The interval that the sensors should be checked.