Proper numatop v2.4 release

Dear maintainers,

I just noticed that the v2.2 tag currently advertises a v2.1 version:

https://github.com/intel/numatop/blob/1b7beb2ee25ddaaf67ffc68c322835c1d31a8945/configure.ac#L5

In addition, it would be nice to have an actual github release for numatop v2.2 with the _dist_ archive available for download, similarly to what the v2.1 release does:

- https://github.com/intel/numatop/releases/tag/v2.1
- https://github.com/intel/numatop/releases/download/v2.1/numatop-v2.1.tar.xz

Since you didn't annotate the v2.2 tag, you could actually update it. Alternatively, since modifying tags is usually frowned upon, you could release a v2.3 that simply adds the missing version bump in `configure.ac`.

Thanks,
Dridi