Fix incorrect off peak translation key for Roborock

[Lash-L]

Breaking change

Proposed change

Kind of embarrassing - but since this is an entity I don't have - I didn't notice the problem. And since it is just a warning in the log, when I ran tests, it didn't catch any errors.

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 Roborock integration causes warnings. #100174
• This PR is related to issue:
• Link to documentation pull request:

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[home-assistant]

Hey there @humbertogontijo, mind taking a look at this pull request as it has been labeled with an integration (roborock) you are listed as a code owner for? Thanks!

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