[Chapel Merge] Document ROCm 7 disclaimer

Branch: refs/heads/main
Revision: d9500c6cfa8d309b39c7a43f0c85c88919421690
Author: benharsh
Link: Document ROCm 7 disclaimer by benharsh · Pull Request #28956 · chapel-lang/chapel · GitHub
Log Message:
Document ROCm 7 disclaimer (#28956)

Due to issues we do not yet understand, some Chapel programs compiled
against ROCm 7 can fail at runtime with unhelpful error messages. Until
we understand this better, we should document this and recommend ROCm
6.3 instead.

[reviewed-by @arifthpe]

Compare: Comparing 215161fa6e9309c8c8515595b1c1a78d3e3b0d2f...36ac72c11c9893a04de313adbb0e9f6e9d72320b · chapel-lang/chapel · GitHub

Diff:
M doc/rst/technotes/gpu.rst
https://github.com/chapel-lang/chapel/pull/28956.diff