v5 Doc Teaser Link

[endigo9740]

Linked Issue(s)

Closes #4530

Description

Adds the proper announcement link to the teaser banner at the top of the docs homepage.

Checklist

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• Prefixed your branch name with: docs/, feature/, task/, bugfix/
• Targeted the main branch
• Documented any changes made
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Latest commit: 1705215

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