[Chapel Merge] Updates to gpu tech note

Branch: refs/heads/main
Revision: 7c94198
Author: stonea
Link: Updates to gpu tech note by stonea · Pull Request #20068 · chapel-lang/chapel · GitHub
Log Message:

Merge pull request #20068 from stonea/technote_gpu_update

Updates to gpu tech note

Use here.gpus instead of here.getChild().
Add section on multilocale support

[Reviewed by @e-kayrakli]

Modified Files:
M doc/rst/technotes/gpu.rst

Compare: https://github.com/chapel-lang/chapel/compare/59d17bbe8bda...7c94198d1ed0