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/du.yaml

@@ -32,7 +32,7 @@ jobs:
           dpkg-query -Wf '${Installed-Size}\t${Package}\n' | sort -n | tail -n 100 | tee /tmp/output/apt-${{matrix.os}}.txt
 
       - name: Upload du output
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: output
           path: /tmp/output

.github/workflows/measure.yaml

@@ -77,7 +77,7 @@ jobs:
           HERE
 
       - name: Upload disk space report
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: measurement_jsons
           path: ${{ steps.json.outputs.output }}
@@ -105,7 +105,7 @@ jobs:
           tree "${{ env.JSON_DIR }}"
 
       - name: Upload merged json
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: output
           path: "${{ env.JSON_DIR }}/measurements.json"