[Bloganuary] Make Bloganuary Nudge only be eligible in December

[thomashorta]

Check if the current month is December for deciding if the Bloganuary Nudge should be shown.

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To Test:

1. Install and log into the Jetpack app using a site that has prompts available
2. Make sure the bloganuary_dashboard_nudge FF is on in Debug Settings
3. Go to your device settings -> Date
4. Set the date to some month that is not December
5. Go back to Jetpack -> My Site Dashboard
6. Verify the Bloganuary card is not shown
7. Go to your device settings -> Date
8. Set the date to December
9. Verify the Bloganuary card is shown

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Regression Notes

1. Potential unintended areas of impact

   • Bloganuary card is shown for other months or if other requirements don't match.

2. What I did to test those areas of impact (or what existing automated tests I relied on)

   • Manual testing, Unit tests.

3. What automated tests I added (or what prevented me from doing so)

   • Added/update unit tests for the ViewModelSlice.

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PR Submission Checklist:

• I have completed the Regression Notes.
• I have considered adding accessibility improvements for my changes.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

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UI Changes Testing Checklist:

No UI changes.

• Portrait and landscape orientations.
• Light and dark modes.
• Fonts: Larger, smaller and bold text.
• High contrast.
• Talkback.
• Languages with large words or with letters/accents not frequently used in English.
• Right-to-left languages. (Even if translation isn’t complete, formatting should still respect the right-to-left layout)
• Large and small screen sizes. (Tablet and smaller phones)
• Multi-tasking: Split screen and Pop-up view. (Android 10 or higher)

[wpmobilebot]

	1 Warning
⚠️	PR is not assigned to a milestone.

Generated by 🚫 Danger

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack by scanning the QR code below to install the corresponding build.

	App Name	Jetpack
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr19707-27cc1c1
	Commit	27cc1c1
	Direct Download	jetpack-prototype-build-pr19707-27cc1c1.apk

Note: Google Login is not supported on these builds.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress by scanning the QR code below to install the corresponding build.

	App Name	WordPress
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr19707-27cc1c1
	Commit	27cc1c1
	Direct Download	wordpress-prototype-build-pr19707-27cc1c1.apk

Note: Google Login is not supported on these builds.

[RenanLukas]

Thanks for the PR. It's working as expected and code LGTM.