Fix typo in exception message in google_photos integration

[lunmay]

Typo: "Home Assistnt" -> "Home Assistant"

Breaking change

Proposed change

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)
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Additional information

• This PR fixes or closes issue: fixes #
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[home-assistant]

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

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