`type2-runtime` version/commit should be informed in stdout

When using appimagetool we know its version seeing the output:
```
appimagetool, continuous build (git version feac857), build 185 built on 2024-11-24 19:31:44 UTC
```

However, it don't give any clue about what "version" (commit sha) of the runtime will be used:
```
Downloading runtime file from https://github.com/AppImage/type2-runtime/releases/download/continuous/runtime-x86_64
Downloaded runtime binary of size 696720
```

Right now, developers need to rely on date and time of the creation of the appimage to get an estimative of what version/commit of the runtime is being used, which is imprecise. So, having this info in stdout would be very useful for debugging.