ci(deps): bump actions/upload-artifact from 4 to 6

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v4...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/benchmark.yml

@@ -43,7 +43,7 @@ jobs:
           # pytest-benchmark --storage file://benchmarks/results --benchmark-compare
 
       - name: Upload Benchmark Results
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         if: always()
         with:
           name: benchmark-report-${{ github.run_id }}

.github/workflows/security-scan.yml

@@ -86,7 +86,7 @@ jobs:
           fi
         
       - name: Upload Security Reports
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: security-reports
           path: |