chore(deps): bump actions/upload-artifact from 4 to 5

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 5.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v5)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/binaries.yml

@@ -27,14 +27,14 @@ jobs:
       - uses: cachix/install-nix-action@v31
       - run: echo "(version $(git describe --always --dirty --abbrev=7))" >> dune-project
       - run: nix build ${{ matrix.installable }}
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           path: result/bin/dune
           name: dune-${{ matrix.name }}
   combine:
     runs-on: ubuntu-latest
     needs: binary
     steps:
-      - uses: actions/upload-artifact/merge@v4
+      - uses: actions/upload-artifact/merge@v5
         with:
           separate-directories: true