Bump the gha-updates group with 2 updates

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

Updates `actions/download-artifact` from 6 to 7
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v6...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: gha-updates
- dependency-name: actions/download-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: gha-updates
...

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

Author: dependabot[bot]

.github/workflows/tests.yml

@@ -53,14 +53,14 @@ jobs:
     - name: Build wheel
       run: uv build --no-sources --wheel  -o dist
 
-    - uses: actions/upload-artifact@v5
+    - uses: actions/upload-artifact@v6
       name: Upload wheel as artifact
       with:
         name: wheels-py${{ matrix.python-version }}
         path: |
           ./dist/*.whl
 
-    - uses: actions/upload-artifact@v5
+    - uses: actions/upload-artifact@v6
       name: Upload test results
       if: always()
       with:
@@ -81,7 +81,7 @@ jobs:
     - name: Build SDist
       run: uv build --no-sources --sdist -o dist
 
-    - uses: actions/upload-artifact@v5
+    - uses: actions/upload-artifact@v6
       with:
         name: sdist
         path: dist/*.tar.gz
@@ -112,14 +112,14 @@ jobs:
     - uses: actions/checkout@v6
 
     - name: Download wheel artifacts
-      uses: actions/download-artifact@v6
+      uses: actions/download-artifact@v7
       with:
         pattern: wheels-*
         path: ./artifacts
         merge-multiple: true
 
     - name: Download sdist artifact
-      uses: actions/download-artifact@v6
+      uses: actions/download-artifact@v7
       with:
         name: sdist
         path: ./artifacts