Extend description of bitmask variable in modbus_controller.rst

[gost-serb]

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Description:

Related issue (if applicable): fixes N/A

Pull request in esphome with YAML changes (if applicable): N/A

• esphome/esphome#<esphome PR number goes here>

Checklist:

• [ ] I am merging into next because this is new documentation that has a matching pull-request in esphome as linked above.
  or

• [x] I am merging into current because this is a fix, change and/or adjustment in the current documentation and is not for a new component or feature.

• [ ] Link added in /components/index.rst when creating new documents for new components or cookbook.

[coderabbitai[bot]]

Walkthrough

The documentation for the Modbus Controller component was updated to clarify the behavior of the bitmask feature. A new explanatory sentence was added to the "Bitmasks" section, specifying how the value is right-shifted according to the lowest set bit in the bitmask.

Changes

File(s)	Change Summary
components/modbus_controller.rst	Added an explanatory sentence to the "Bitmasks" section, clarifying the right-shift behavior of values.

Suggested reviewers

• nagyrobi

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[github-actions[bot]]

There hasn't been any activity on this pull request recently. This pull request has been automatically marked as stale because of that and will be closed if no further activity occurs within 7 days. Thank you for your contributions.