MAINT: 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] <[email protected]>

Author: dependabot[bot]

.github/workflows/ci_cd.yml

@@ -89,7 +89,7 @@ jobs:
           xvfb-run make -C doc linkcheck
 
       - name: Upload HTML Documentation
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: documentation-html
           path: doc/_build/html

.github/workflows/ci_cd_nightly.yml

@@ -105,7 +105,7 @@ jobs:
           xvfb-run mechanical-env make -C doc html
 
       - name: Upload HTML Documentation
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: documentation-html
           path: doc/_build/html