Fix Sensors for Homematic device HmIP-DLD

[danielperna84]

Proposed change

While upgrading the dependency I have added the device-class to the incorrect discovery-type. As I don't own the device I didn't notice this until it was brought to my attention here.

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)
• 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:

Checklist

• The code change is tested and works locally.
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  Updated by running python3 -m script.gen_requirements_all.
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[probot-home-assistant]

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

@ProfDrYoMan don't spam!