Bump pyenphase to 1.20.6

[catsmanac]

Proposed change

Bump pyenphase to 1.20.6

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

https://github.com/pyenphase/pyenphase/releases
pyenphase/pyenphase@v1.20.3...v1.20.6

• Adds improved error handling for Enphase_envoy communication issues.

• This PR fixes or closes issue: fixes Enphase integration reporting erroneous data causing issues in the Energy panel #120091

• This PR is related to issue:

• Link to documentation pull request:

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[home-assistant]

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

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