www: fix upgrade banner

[gioelecerati]

What does this pull request do? Explain your changes. (required)

• Tentative fix to display the banner prompting to upgrade

Specific updates (required)

How did you test each of these updates (required)

Does this pull request close any open issues?

Screenshots (optional)

Checklist

• [ ] I have read the CONTRIBUTING document.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes.

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