Bump actions/upload-artifact from 5 to 6

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -68,7 +68,7 @@ jobs:
         run: sbt "buildNativeArtifacts; test"
       - name: Archive native artifacts (Linux)
         if: ${{ runner.os == 'Linux' && matrix.jobtype == '1' }}
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: dist-${{ runner.os }}
           path: |
@@ -77,7 +77,7 @@ jobs:
             src/main/resources/win32/x86_64/sbtipcsocket.dll
       - name: Archive native artifacts (macOS)
         if: ${{ matrix.os == 'macos-13' }}
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: dist-${{ runner.os }}
           path: src/main/resources/darwin/x86_64/libsbtipcsocket.dylib