Bump actions/upload-artifact from 5 to 6 (#1229)

* Bump actions/checkout from 5 to 6 (#1225)

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* Bump actions/upload-artifact from 5 to 6

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jesper Friis <jesper-friis@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/cd_release.yml

@@ -176,7 +176,7 @@ jobs:
         CIBW_MUSLLINUX_I686_IMAGE:   ${{ env.CONTAINER_REGISTRY }}/sintef/dlite-python-musllinux${{ matrix.system_type[1] }}_i686:latest
 
     - name: Store wheels for publishing
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: wheels_${{ matrix.os }}_${{ matrix.system_type[0] }}_${{ matrix.system_type[1] }}_${{ matrix.arch }}_${{ matrix.py_minors }}
         path: wheelhouse/*.whl
@@ -215,7 +215,7 @@ jobs:
       run: python -m build --no-isolation --sdist python
 
     - name: Store sdist for publishing
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         # Note that they are moved to a common directory sdist_____ (5 underscores, as in the name below)
         name: sdist_${{ matrix.os }}_${{ matrix.system_type[0] }}_${{ matrix.system_type[1] }}_${{ matrix.arch }}_${{ matrix.py_minors }}