build(deps): bump actions/upload-artifact from 4 to 6

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v4...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/ci.yml

@@ -203,7 +203,7 @@ jobs:
           verbose: true
 
       - name: Upload log
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: syslog-cache-${{ matrix.cache }}
           path: /var/log/syslog
@@ -254,7 +254,7 @@ jobs:
           rm -rf tmp
           
       - name: Store packages
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         if: "!startsWith(github.ref, 'refs/tags/v')"
         with:
           name: ${{ matrix.arch }}-${{ github.sha }}-${{ matrix.version }}-packages
@@ -270,7 +270,7 @@ jobs:
           file_glob: true
 
       - name: Store logs
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: ${{ matrix.arch }}-${{ github.sha }}-${{ matrix.version }}-logs
           path: logs/