Bump actions/upload-artifact from 3 to 4

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v3...v4)

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

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/ci-testing.yml

@@ -88,7 +88,7 @@ jobs:
           coveralls --service=github
 
       - name: Upload image results
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: image-failures-${{ matrix.os }}-${{ matrix.python-version }}

.github/workflows/release.yml

@@ -50,7 +50,7 @@ jobs:
         run: twine check dist/*
 
       - name: Upload sdist result
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: sdist
           path: dist/*.tar.gz
@@ -118,7 +118,7 @@ jobs:
           only: ${{ matrix.only }}
           package-dir: dist/${{ needs.build_sdist.outputs.SDIST_NAME }}
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           path: ./wheelhouse/*.whl