Update banner destination links to YOLO27

[raimbekovm]

Update the banner destination links to the YOLO27 page. Preserve the existing https://raw.githubusercontent.com/ultralytics/assets/main/yolov8/banner-yolov8.png image URL.

The artwork replacement shipped in ultralytics/assets#200, which updated the same shared asset, so the banner image already shows YOLO27 here and only the link still points at the previous campaign.

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Updated README banner links across nine model pages to direct users to the YOLO27 page while preserving the existing banner image URL.

📊 Key Changes

• Replaced the YOLO Vision campaign destination with https://www.ultralytics.com/yolo/yolo27 and updated its tracking parameters to the YOLO27 launch campaign.
• Applied the same link change to the YOLO11n, YOLO26 task, YOLOE11s, and YOLOv8s-worldv2 README banners.
• Kept the shared banner-yolov8.png image URL unchanged.

🎯 Purpose & Impact

• Clicking these README banners now opens the YOLO27 page instead of the previous YOLO Vision event page; model code and documentation content are otherwise unchanged.

[UltralyticsAssistant]

👋 Hello @raimbekovm, thank you for submitting a ultralytics/replicate 🚀 PR! This automated message confirms your contribution was received, and an Ultralytics engineer will assist with the review. To ensure a seamless integration of your work, please review the following checklist:

• ✅ Define a Purpose: Clearly explain the purpose of your fix or feature in your PR description, and link to any relevant issues. Ensure your commit messages are clear, concise, and adhere to the project's conventions.
• ✅ Synchronize with Source: Confirm your PR is synchronized with the ultralytics/replicate main branch. If it's behind, update it by clicking the 'Update branch' button or by running git pull and git merge main locally.
• ✅ Ensure CI Checks Pass: Verify all Ultralytics Continuous Integration (CI) checks are passing. If any checks fail, please address the issues.
• ✅ Update Documentation: Update the relevant documentation for any new or modified features.
• ✅ Add Tests: If applicable, include or update tests to cover your changes, and confirm that all tests are passing.
• ✅ Sign the CLA: Please ensure you have signed our Contributor License Agreement if this is your first Ultralytics PR by writing "I have read the CLA Document and I sign the CLA" in a new message.
• ✅ Minimize Changes: Limit your changes to the minimum necessary for your bug fix or feature addition. "It is not daily increase but daily decrease, hack away the unessential. The closer to the source, the less wastage there is." — Bruce Lee

For more guidance, please refer to our Contributing Guide. Don't hesitate to leave a comment if you have any questions. Thank you for contributing to Ultralytics! 🚀

[UltralyticsAssistant]

🔍 PR Review

_{Made with ❤️ by Ultralytics Actions}

Reviewed all 9 README banner updates. Each change preserves the existing banner image URL and points to the requested YOLO27 destination with consistent tracking parameters. No bugs, regressions, or compatibility issues found. LGTM.

[UltralyticsAssistant]

🎉 Thank you @raimbekovm for the merged PR #50!

“Great things are done by a series of small things brought together.” — Vincent van Gogh

This focused update aligns banner links across nine model pages with the YOLO27 page while preserving the existing banner image URL.