build(deps): bump actions/upload-artifact from 3 to 4 (#6070)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v3...v4)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/windows.yml

@@ -47,7 +47,7 @@ jobs:
         run: src/bin/buildForWindows.sh
       -
         name: Archive production artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: etherpad-win.zip
           path: etherpad-win.zip
@@ -80,7 +80,7 @@ jobs:
           script-file: 'src/bin/nsis/etherpad.nsi'
       -
         name: Archive production artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: etherpad-win.exe
           path: etherpad-win.exe