update beta branch version

[bharvey88]

Version:

What does this implement/fix?

Types of changes

• Bugfix (fixed change that fixes an issue)
• New feature (thanks!)
• Breaking change (repair/feature that breaks existing functionality)
• Dependency Update - Does not publish
• Other - Does not publish
• Website of github readme file update - Does not publish
• Github workflows - Does not publish

Checklist / Checklijst:

• The code change has been tested and works locally
• The code change has not yet been tested

If user-visible functionality or configuration variables are added/modified:

• Added/updated documentation for the web page

Summary by CodeRabbit

• Chores
  • Updated version number to reflect the latest release.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

Version number updated in ESPHome Core configuration from "25.8.6.1" to "25.12.18.1". The substitution variable affects the device description display. No functional logic changes.

Changes

Cohort / File(s)	Summary
Version Update Integrations/ESPHome/Core.yaml	Updated substitutions.version from "25.8.6.1" to "25.12.18.1"; device description will reflect the new version

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A version hop, from old to new,
Twenty-five point twelve comes through,
The config whispers, the numbers dance,
ESPHome takes another chance! ✨

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch update-beta-version

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📜 Recent review details

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 0cd567f and f8008fd.

📒 Files selected for processing (1)

• Integrations/ESPHome/Core.yaml (1 hunks)

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