Stop picking my Go version for me

The go.mod file contains a mandatory go <version number> directive. Since Go 1.21, when a change was introduced to make this include a full patch number (1.21.0 instead of 1.21), a number of projects have started using this wrong, hurting everyone. The version is the minimum version your project can be compiled with. It is not the version you use to compile your project, but the minimum version that anyone can use to compile your project.