Support for security vulnerabilities in 1.x and 2.x

We recently received some inquiries about how long we will support 1.x and 2.x with security fixes.

• 1.x will be supported for another 12 months up until August 2024
• 2.x will be supported for another 24 months up until August 2025

We also released https://github.com/NodeBB/NodeBB/releases/tag/v2.8.16 and https://github.com/NodeBB/NodeBB/releases/tag/v1.19.12 containing some of the fixes from the 3.x line. If you are not able to upgrade to 3.x we encourage you to upgrade to these releases.