docs(contributing): ask GPU changes to name the GPUs their tests ran on

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.github/pull_request_template.md

@@ -14,4 +14,5 @@
 - [ ] Generic behaviour, not specific to one title
 - [ ] Depends on: <!-- #PR, or none -->
 - [ ] Unblocks: <!-- title ID and Game bring-up discussion, e.g. PPSA01325 #3232, or none -->
+- [ ] GPUs tested: <!-- for AGC, shader recompiler or VideoOut changes: vendor, model, driver and OS of each GPU the GPU tests ran on; otherwise n/a -->
 - [ ] AI-assisted: <!-- yes / no -->

CONTRIBUTING.md

@@ -60,6 +60,7 @@ The [pull request template](.github/pull_request_template.md) is the checklist f
 - The PR overlap comment lists open pull requests that change the same lines or exports; agree with their authors which one goes first and declare it with `Depends on`.
 - Run the tests before opening the pull request and describe what was tested (OS, title or homebrew).
 - A pull request that claims a change in speed shows the summary lines of `main` and of the change, from the same machine and scene, and attaches the traces, captured as the [Performance report](.github/ISSUE_TEMPLATE/performance.yml) issue form describes. A slow scene is reported with the same form.
+- Changes to the AGC driver, the shader recompiler or VideoOut name each GPU the GPU tests ran on (vendor, model, driver, OS) on the `GPUs tested` checklist line. CI runs these tests only on lavapipe, and hardware drivers fail where lavapipe and other vendors pass, so a reviewer can ask for a run on another vendor before merging.
 - Investigation notes, reports, screenshots and logs go in the pull request, not in the repository. Images for documentation go in the [gist](https://gist.github.com/boykopovar/0e53f2e1426f29ecd41e3b51540b8a90) comments.
 - Say whether the change was written with AI assistance. The author of the pull request is responsible for every line of it.