Fix Ecoforest unknown alarm translation key

[maylikenoother]

Proposed change

Fix a typo in the Ecoforest integration translation key for the alarm enum state.
This ensures the "Unknown alarm" state is translated correctly.

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[home-assistant]

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

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[joostlek]

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[jbouwh]

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