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/ci.yml

@@ -106,7 +106,7 @@ jobs:
     - name: Test
       if: matrix.target-platform == 'JS' && matrix.scala-version == '3'
       run: sbt $SBT_JAVA_OPTS catsJS3/test circeJsonJS3/test clientCoreJS3/test clientTestsJS3/test coreJS3/test jsoniterScalaJS3/test openapiDocsJS3/test redocJS3/test serverCoreJS3/test sttpClientJS3/test testingJS3/test testsJS3/test uPickleJsonJS3/test zioJsonJS3/test
-    - uses: actions/upload-artifact@v3  # upload test results
+    - uses: actions/upload-artifact@v4  # upload test results
       if: success() || failure()        # run this step even if previous step failed
       with:
         name: 'tests-results-${{ matrix.scala-version }}-${{ matrix.target-platform }}-${{ matrix.java }}'