Fix math in `BochscpuRunStats_t::print`

```c++
    const uint64_t DirtyMemoryBytes = DirtyGpas * Page::Size;
    const uint64_t DirtyMemoryMb = DirtyGpas / Page::Size;
    fmt::print("          Dirty pages: {} bytes ({} MB)\n", DirtyMemoryBytes,
```