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] <[email protected]>

.github/workflows/debian.yml

@@ -25,11 +25,11 @@ jobs:
         with:
           python-version: '3.9'
       - run: make sdist
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: upstream-source
           path: dist/
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: upstream-debian-source
           path: debian/
@@ -68,7 +68,7 @@ jobs:
           DEBFULLNAME: GitHub Actions
       - run: dpkg-buildpackage -us -uc -S
         working-directory: source
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: debian-source
           path: ${{ needs.source.outputs.project-name }}_${{ needs.source.outputs.project-version }}*
@@ -87,7 +87,7 @@ jobs:
         working-directory: source
       - run: dpkg-buildpackage -us -uc
         working-directory: source
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: debian-binary
           path: |