build(deps): bump actions/upload-artifact from 6 to 7 (#272)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/check-extension.yaml

@@ -301,7 +301,7 @@ jobs:
         run: ../../../vendor/bin/phpunit -c phpunit.xml.dist --testsuite Extension_Integration_Tests
       
       - name: Upload test sandbox dir
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         if: failure()
         with:
           name: sandbox-data-${{ steps.magento-version.outputs.version }}

.github/workflows/integration.yaml

@@ -182,7 +182,7 @@ jobs:
       name: Run Integration Tests
 
     - name: Upload test sandbox dir
-      uses: actions/upload-artifact@v6
+      uses: actions/upload-artifact@v7
       if: failure()
       with:
         name: sandbox-data-${{ steps.magento-version.outputs.version }}