upload-artifact v4 upgrade (#119)

Author: 0xFirekeeper

.github/workflows/release.yml

@@ -30,7 +30,7 @@ jobs:
         run: dotnet nuget push "./Thirdweb/bin/Release/*.nupkg" --api-key ${{ secrets.NUGET_API_KEY }} --source https://api.nuget.org/v3/index.json
 
       - name: Upload build artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: build-artifacts
           path: |