Bump the action-dependencies group with 2 updates

Bumps the action-dependencies group with 2 updates: [actions/upload-artifact](https://github.com/actions/upload-artifact) and [actions/download-artifact](https://github.com/actions/download-artifact).


Updates `actions/upload-artifact` from 4 to 5
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v5)

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

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: action-dependencies
- dependency-name: actions/download-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: action-dependencies
...

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

Author: dependabot[bot]

.github/workflows/build-wheels.yml

@@ -121,7 +121,7 @@ jobs:
           CIBW_REPAIR_WHEEL_COMMAND_LINUX: |
             auditwheel repair --exclude libmetatensor.so --exclude libmetatensor_torch.so --exclude libtorch.so --exclude libtorch_cpu.so --exclude libc10.so -w {dest_dir} {wheel}
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: torch-single-version-wheel-${{ matrix.torch-version }}-${{ matrix.os }}-${{ matrix.arch }}
           path: ./wheelhouse/*.whl
@@ -152,7 +152,7 @@ jobs:
       - uses: actions/checkout@v5
 
       - name: Download wheels
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           pattern: torch-single-version-wheel-*-${{ matrix.os }}-${{ matrix.arch }}
           merge-multiple: false
@@ -194,7 +194,7 @@ jobs:
       - name: check wheels with twine
         run: twine check wheelhouse/*
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: torch-wheel-${{ matrix.os }}-${{ matrix.arch }}
           path: ./wheelhouse/*.whl
@@ -230,7 +230,7 @@ jobs:
         run: |
           ./scripts/package-torch.sh dist/cxx/
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: others
           path: |
@@ -247,20 +247,20 @@ jobs:
       pull-requests: write
     steps:
       - name: Download metatomic-torch wheels
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           path: wheels
           pattern: torch-wheel-*
           merge-multiple: true
 
       - name: Download other wheels and sdists
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           path: wheels
           name: others
 
       - name: Re-upload a single wheels artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: wheels
           path: |

.github/workflows/docs.yml

@@ -39,7 +39,7 @@ jobs:
         run: tox -e docs
 
       - name: store documentation as github artifact to be downloaded by users
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: docs
           path: docs/build/html/*