Minecraft wiki entry for Creating_a_resource_pack, associated text: 1 for versions 1.6.1 – 1.8.9
2 for versions 1.9 – 1.10.2
3 for versions 1.11 – 1.12.2
4 for versions 1.13 – 1.14.4
5 for versions 1.15 – 1.16.1
6 for versions 1.16.2 – 1.16.5
7 for versions 1.17.x
8 for versions 1.18.x
9 for versions 1.19.x