Bump actions/upload-artifact from 2 to 4

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 2 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v2...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/build-test.yaml

@@ -162,7 +162,7 @@ jobs:
         working-directory: "e2e/newenemy"
         run: |
           go test -v -timeout 11m ./...
-      - uses: "actions/upload-artifact@v2"
+      - uses: "actions/upload-artifact@v4"
         if: "always()"
         # this upload step is really flaky, don't fail the job if it fails
         continue-on-error: true