Bump actions/upload-artifact from 3 to 4

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] <[email protected]>

.github/workflows/phpunits.yaml

@@ -133,7 +133,7 @@ jobs:
 
       - name: Artifact upload
         id: unit-upload
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: junit
           path: build/junit-${{matrix.wallet-versions}}-${{ matrix.php-versions }}-${{ matrix.caches }}-${{ matrix.databases }}.xml