Build: Bump actions/download-artifact from 3 to 4

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

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/autobuild.yml

@@ -462,7 +462,7 @@ jobs:
       # Unfortunately download-artifact action doesn't support wild card downloads. Thus downloading all artifacts
       - name:                       Download all artifacts
         if:                         env.GPG_REPO_KEY_MISSING == 'false'
-        uses:                       actions/download-artifact@v3
+        uses:                       actions/download-artifact@v4
         with:
           path:                     releasedl/
       - name:                       Create Debian repository