Bump actions/upload-artifact from 4.1.0 to 4.3.1

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4.1.0 to 4.3.1.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@1eb3cb2...5d5d22a)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/exercise-tests.yml

@@ -58,7 +58,7 @@ jobs:
         run: julia --color=yes --project runtestrunner.jl
 
       - name: Upload reports as artifact
-        uses: actions/upload-artifact@1eb3cb2b3e0f29609092a73eb033bb759a334595
+        uses: actions/upload-artifact@5d5d22a31266ced268874388b861e4b58bb5c2f3
         with:
           name: test-reports
           path: ${{ steps.generate-reports.outputs.results-path }}