Lineage, like a lot of custom ROMs out there, builds on a schedule regardless of whether there are any actual changes.
There are exactly zero actual code changes between 20200824 and 20200831. All of the changes in that week are administrative (adding supported devices, updating the wiki, etc.) So that means:
- You do not need to update, there is nothing actually updated. Feel free to dismiss the OTA notification.
- The update should not cause any issues if it is applied correctly and successfully.