[DOCS] salt.modules.file.seek_read contains incorrect arg name in the description

[JayTruscott-dev]

Description
The args listed for salt.modules.file.seek_read are path, size, offset. But the description of the args lists them as path, seek, offset.

Suggested Fix
Please replace the usage of "seek" as an arg here with the correct name "size" to avoid possible reader confusion.

Type of documentation
Salt Execution Module documentation

Location or format of documentation
https://docs.saltproject.io/en/master/ref/modules/all/[salt.modules.file](https://docs.saltproject.io/en/master/ref/modules/all/salt.modules.file.html#salt.modules.file.seek_read).html#salt.modules.file.seek_read

Additional context
Add any other context or screenshots about the feature request here.

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