Bump actions/download-artifact from 5 to 6 (#689)

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci_cd.yml

@@ -225,7 +225,7 @@ jobs:
     needs: [package, library-version]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: ansys-hps-client-artifacts
           path: /tmp/artifacts