chore(deps): bump actions/upload-artifact from 4 to 7

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v4...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>

.github/workflows/tests.yml

@@ -59,7 +59,7 @@ jobs:
 
       - name: Upload unit coverage report
         if: matrix.python-version == '3.12'
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: coverage-unit-py${{ matrix.python-version }}
           path: coverage-unit.xml
@@ -100,7 +100,7 @@ jobs:
             --cov-report=xml:coverage-integration.xml
 
       - name: Upload integration coverage report
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: coverage-integration
           path: coverage-integration.xml
@@ -150,7 +150,7 @@ jobs:
             --cov-fail-under=30
 
       - name: Upload combined coverage
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: coverage-combined
           path: coverage-combined.xml