Updating banner content for new release

[ericspod]

Update for the 1.6.0 release. I'm unsure if other areas need changing.

Summary by CodeRabbit

• Chores
  • Updated banner to reference MONAI Core v1.6.0, with link to the latest version's "what's new" page.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 457b4f54-bb51-44bd-b39d-38baaa383a51

📥 Commits

Reviewing files that changed from the base of the PR and between 976a571 and 51ceb68.

📒 Files selected for processing (1)

• src/components/Header.astro

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Walkthrough

The first predefined banner in src/components/Header.astro is updated from MONAI Core v1.5.1 to v1.6.0, changing the banner id, message, and link URL to point to the v1.6.0 "what's new" page. All other banner fields remain unchanged.

Changes

MONAI Core v1.6.0 Banner Update

Layer / File(s)	Summary
Banner id, message, and link updated to v1.6.0 src/components/Header.astro	The first predefined banner entry's id, message, and link fields are changed from v1.5.1 to v1.6.0; all other banner configuration fields are unchanged.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Updating banner content for new release' accurately summarizes the main change—updating the banner to reference MONAI Core v1.6.0.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch update_1_6_0

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[ericspod]

@zephyrie please review before we merge, I might be missing other things needing updating.