Bump actions/upload-artifact in the github-actions group

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


Updates `actions/upload-artifact` from 4.3.6 to 4.4.0
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@834a144...5076954)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/build.yml

@@ -144,7 +144,7 @@ jobs:
 
       # upload repo artifact before testing them to troubleshoot failures
       - name: Store repo as artifact
-        uses: actions/upload-artifact@834a144ee995460fba8ed112a2fc961b36a5ec5a
+        uses: actions/upload-artifact@50769540e7f4bd5e21e526ee35c689e35e0d6874
         with:
           name: spel-repo-el${{ matrix.el_version }}
           path: .repo/el${{ matrix.el_version }}