chore(deps): bump actions/upload-artifact from 4 to 5

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 5.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v5)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/agentready-assessment.yml

@@ -205,7 +205,7 @@ jobs:
           } >> "$GITHUB_OUTPUT"
 
       - name: Upload Assessment Reports
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         if: always()
         with:
           name: agentready-reports-${{ github.run_id }}

.github/workflows/tests_simplified.yml

@@ -66,7 +66,7 @@ jobs:
 
       - name: Upload coverage
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: coverage-report
           path: htmlcov/