update banner for April 2024 PSU releases

[sxa]

Self-explanatory and part of the standard release process.

Please do not merge this until at least one build pipeline has been triggered.

Description of change

Checklist

• [ ] npm test passes
• [ ] documentation is changed or added (if applicable)
• [ ] permission has been obtained to add new logo (if applicable)
• [ ] contribution guidelines followed here

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