build(deps): 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]>

Author: dependabot[bot]

.github/workflows/ci-macvim.yaml

@@ -360,7 +360,7 @@ jobs:
 
       - name: Upload MacVim image
         if: startsWith(github.ref, 'refs/tags/') && matrix.publish
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: MacVim${{ matrix.publish_postfix  }}.dmg
           path: src/MacVim/build/Release/MacVim${{ matrix.publish_postfix }}.dmg