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/build-wheels.yml

@@ -65,7 +65,7 @@ jobs:
         uses: pypa/[email protected]
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: ${{ matrix.os }}-wheel-artifact
           path: ./wheelhouse/*.whl
@@ -88,7 +88,7 @@ jobs:
         run: python -m build --sdist .
 
       - name: Upload sdist
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: src-artifact
           path: dist/*

.github/workflows/pythonapp.yml

@@ -83,15 +83,15 @@ jobs:
           python -m sphinx -W -b html source build/html
           rm -rf build/html/.doctrees
       - name: Upload C++ documentation artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: doc-cpp-${{ matrix.python-version }}
           path: |
             doc/cpp/html
           retention-days: 2
           if-no-files-found: error
       - name: Upload Python documentation artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: doc-python-${{ matrix.python-version }}
           path: |