Redshift maintenance version details

Hi , updates are still being published at the URL you mentioned, the second line is containing all info on updates that will happen between Nov 15 2021 ans Jan 12 2022.

(12/16/2021)

We will be patching your Amazon Redshift clusters during your system maintenance window in the coming weeks. The timing of the patch will depend on your region and maintenance window settings. You can view or change your maintenance window settings from the AWS Management Console. After your cluster has been patched, the new cluster version will be Build 1.0.34355. Please contact us at redshift-feedback@amazon.com if you have any questions.

This version includes the following new features and improvements in addition to what is available in the major version:

• Miscellaneous fixes

hope this helps