If looking for different release notes, please, refer to the answer to the question Where to find AWS Release Notes?
List to other maintenance posts (they can be searched with the phrase "AWS Redshift Maintenance Announcement") below:
[Announcement] Amazon Redshift Maintenance (January 19th 2022 - March 25th 2022)
AWS Redshift Maintenance Announcement (March 2nd - April 4th 2022)
[Announcement] Amazon Redshift Maintenance (October 18th 2021 - January 18th 2022)
[Announcement] Amazon Redshift Maintenance (March 3rd 2022 - April 5th 2022)
How do I find previous release announcements for redshift?asked 5 months ago
Redshift Version Historyasked 6 months ago
AWS Redshift Maintenance Announcement (January 9th - March 24th 2022)
[Announcement] Amazon Redshift Maintenance (November 15th 2021 - January 18th 2022)
Redshift maintenance version detailsasked 8 months ago
Where to find AWS Redshift Release Notes?