Update xnnpack to the latest commit (#95884)
After trying to update cpuinfo submodule to the latest, I saw that an update on xnnpack is also necessary.
Fixes the 2 failing checks on [#95379](https://github.com/pytorch/pytorch/pull/95379)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/95884
Approved by: https://github.com/Skylion007
