minecraft server version is 1.20.6 instead of 1.21

Put the summary of the bug you're having here

What I expected to happen was...:

launching server after downloading from official page should have been 1.21

What actually happened was...:
minecraft server version is  1.20.6 instead of 1.21

Steps to Reproduce:
1. https://www.minecraft.net/en-us/download/server
2. download server
3. launch server

4. check version.