chore(deps): update actions/upload-artifact action to v5 (gfx-rs#8434)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -609,7 +609,7 @@ jobs:
         # git diff doesn't check untracked files, we need to stage those then compare with HEAD.
         run: git add . && git diff --exit-code HEAD naga/tests/out
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         if: always() # We want artifacts even if the tests fail.
         with:
           name: comparison-images-${{ matrix.os }}