chore(deps): bump actions/upload-artifact from 6 to 7 (#11)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v6...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -58,7 +58,7 @@ jobs:
           pip install dist/*.whl
           cd /tmp
           python -c "import apps.nulla_api_server; import apps.brain_hive_watch_server; import core.tool_intent_executor; import tools.registry; import relay.channel_outbound; import installer.register_openclaw_agent; import yaml; import psutil"
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         with:
           name: dist
           path: dist/

.github/workflows/llm_acceptance.yml

@@ -67,15 +67,15 @@ jobs:
             --output-root reports/llm_eval/latest \
             --baseline-root reports/llm_eval/baselines
 
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         if: always()
         with:
           name: llm-eval-fast-reports
           path: |
             reports/llm_eval/latest/
             docs/LLM_ACCEPTANCE_REPORT.md
 
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         if: always()
         with:
           name: llm-eval-baseline
@@ -134,7 +134,7 @@ jobs:
             --live-run-root artifacts/acceptance_runs/llm_eval_live \
             --base-url http://127.0.0.1:18080
 
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         if: always()
         with:
           name: llm-eval-live-reports