(#923) Add 12 Days of Chocolatey Packaging Banner

[st3phhays]

Description Of Changes

• This adds a top banner to promote the 12 Days of Chocolatey Packaging.

Motivation and Context

We want to promote the 12 Days of Chocolatey Packaging over the holidays.

Testing

1. Run the website
2. Ensure the top banner appears with the correct text, is green, and takes you to the blog when clicked.

Operating Systems Testing

n/a

Change Types Made

• Bug fix (non-breaking change).
• Feature / Enhancement (non-breaking change).
• Breaking change (fix or feature that could cause existing functionality to change).
• Documentation changes.
• PowerShell code changes.

Change Checklist

• Requires a change to the documentation.
• Documentation has been updated.
• Tests to cover my changes, have been added.
• All new and existing tests passed?
• PowerShell code changes: PowerShell v2 compatibility checked?

Related Issue

• Add top banner for 12 Days of Chocolatey Packaging choco-theme#363
• https://github.com/chocolatey/chocolatey.org/issues/294
• Add top banner for 12 Days of Chocolatey Packaging #923
• Add top banner for 12 Days of Chocolatey Packaging home#288
• https://gitlab.com/chocolatey/community-infrastructure/community.chocolatey.org/-/issues/1241

[vexx32]

Looks good to me! great work, Steph! :3