[AMDGPU][Docs] Fix broken link to HRF memory model reference (#88696)

The link to the Heterogeneous-race-free Memory Models ASPLOS'14 paper by
Hower et al. pointed to a bogus website, probably because the domain
ownership has changed.
This patch updates it to a version hosted on research.cs.wisc.edu.

GitOrigin-RevId: 7b8625ec16efcb6d11e14a80e08c65dbfe68db9f
1 file changed