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/dotnet-core.yml

@@ -120,7 +120,7 @@ jobs:
         if: contains(github.ref,'refs/tags/')
         run: dotnet nuget push IsIdentifiable.*.nupkg -s https://api.nuget.org/v3/index.json -k ${{ secrets.NUGET_KEY }} --skip-duplicate
       - name: Store created nupkg files
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           path: release/IsIdentifiablePlugin.*.nupkg
           retention-days: 1