ci(deps): bump actions/upload-artifact

Bumps the gha group with 1 update in the / directory: [actions/upload-artifact](https://github.com/actions/upload-artifact).


Updates `actions/upload-artifact` from 5 to 7
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v5...v7)

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

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

Author: dependabot[bot]

.github/workflows/mutmut.yml

@@ -140,7 +140,7 @@ jobs:
 
       - name: Upload artifact
         if: always()
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v7
         with:
           name: mutmut-audit-${{ github.run_number }}
           path: |