chore: bump actions/upload-artifact from 5 to 6

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v5...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

@@ -16,7 +16,7 @@ jobs:
             - uses: ammaraskar/gcc-problem-matcher@master
             - name: build Inkay
               run: docker run --rm -v ${PWD}:/app -w /app builder
-            - uses: actions/upload-artifact@v5
+            - uses: actions/upload-artifact@v6
               with:
                   name: inkay
                   path: dist/