Bump actions/download-artifact from 2 to 4.1.7 in /.github/workflows

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 2 to 4.1.7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v2...v4.1.7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
...

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

.github/workflows/integrate.yml

@@ -137,7 +137,7 @@ jobs:
           token: ${{ secrets.USER_GITHUB_TOKEN }}
 
       - name: Resolve last validated commit hash (for `git diff` purposes)
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4.1.7
         continue-on-error: true
         with:
           name: last-validated-commit-hash