Bump actions/upload-artifact from 3 to 4 (#18)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v3...v4)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  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>

.github/workflows/tests.yml

@@ -34,7 +34,7 @@ jobs:
       - name: Run PHPStan
         continue-on-error: true
         run: vendor/bin/phpstan analyze --configuration=tests/phpstan.neon --error-format=sarif --xdebug "tests/" > local-results.sarif
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: local-${{ matrix.php-version }}
           path: local-results.sarif
@@ -68,7 +68,7 @@ jobs:
       - name: Run PHPStan
         continue-on-error: true
         run: vendor/bin/phpstan analyze --configuration=tests/phpstan.neon --error-format=sarif --xdebug "tests/" > package-results.sarif
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: package-${{ matrix.version }}-${{ matrix.php-version }}
           path: package-results.sarif