Bump actions/upload-artifact from 6 to 7

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

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

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

Author: dependabot[bot]

.github/workflows/build.yaml

@@ -112,7 +112,7 @@ jobs:
       run: make coverage
 
     - name: Upload test results (Python)
-      uses: actions/upload-artifact@v6
+      uses: actions/upload-artifact@v7
       with:
         name: test-results-${{ matrix.os }}-${{ matrix.python-version }}
         path: junit.xml
@@ -129,7 +129,7 @@ jobs:
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
 
-    - uses: actions/upload-artifact@v6
+    - uses: actions/upload-artifact@v7
       with:
         name: dist-${{matrix.os}}-${{matrix.python-version}}
         path: dist