Fix spelling of RS-232 in Denon RS-232 integration

[balloob]

Proposed change

Updates the user-facing spelling of "RS232" to "RS-232" in the Denon RS-232 integration. "RS-232" is the correct spelling of the standard.

Changes are limited to user-facing strings and docstrings:

• Integration display name in manifest.json and the generated integrations index
• Module and class docstrings in the integration and its tests

The internal domain (denon_rs232), the external package import (denon_rs232), and Python class identifiers (e.g. DenonRS232ConfigFlow) are left unchanged — hyphens aren't valid in Python identifiers, and renaming the domain would be a breaking change for existing users.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to documentation pull request:
• Link to developer documentation pull request:
• Link to frontend pull request:

Checklist

• I understand the code I am submitting and can explain how it works.
• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• I have followed the perfect PR recommendations
• The code has been formatted using Ruff (ruff format homeassistant tests)
• Tests have been added to verify that the new code works.
• Any generated code has been carefully reviewed for correctness and compliance with project standards.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• For the updated dependencies a diff between library versions and ideally a link to the changelog/release notes is added to the PR description.

To help with the load of incoming pull requests:

• I have reviewed two other open pull requests in this repository.

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Generated by Claude Code

[Copilot]

Pull request overview

This pull request corrects the user-facing spelling of the Denon RS-232 integration name by updating occurrences of “RS232” to the standard “RS-232”, without changing the integration domain or Python identifiers.

Changes:

• Update the integration display name to “Denon RS-232” in manifest.json.
• Regenerate/update the corresponding entry in homeassistant/generated/integrations.json.
• Update integration/test module and class docstrings to use “RS-232”.

Reviewed changes

Copilot reviewed 10 out of 11 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
homeassistant/components/denon_rs232/manifest.json	Updates the integration display name to “Denon RS-232”.
homeassistant/generated/integrations.json	Updates the generated integration index entry name to match the manifest.
homeassistant/components/denon_rs232/__init__.py	Updates module/function docstrings to “RS-232”.
homeassistant/components/denon_rs232/config_flow.py	Updates module/class docstrings to “RS-232”.
homeassistant/components/denon_rs232/const.py	Updates module docstring to “RS-232”.
homeassistant/components/denon_rs232/media_player.py	Updates module/function/class docstrings to “RS-232”.
tests/components/denon_rs232/__init__.py	Updates test module docstring to “RS-232”.
tests/components/denon_rs232/conftest.py	Updates test fixtures module docstring to “RS-232”.
tests/components/denon_rs232/test_config_flow.py	Updates test module docstring to “RS-232”.
tests/components/denon_rs232/test_init.py	Updates test module docstring to “RS-232”.
tests/components/denon_rs232/test_media_player.py	Updates test module docstring to “RS-232”.