Fix GitHub Actions and pyproject.toml configuration issues

- Updated actions/upload-artifact from deprecated v3 to v4
- Fixed pyproject.toml license format from "MIT" to {text = "MIT"}
- Package configuration now validates successfully

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.github/workflows/test.yml

@@ -84,7 +84,7 @@ jobs:
         run: bandit -r wikijs -f json -o bandit-report.json || true
       
       - name: Upload bandit report
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: bandit-report
           path: bandit-report.json