Bump NuGet packages to 4.5.0 - #283

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: darenm/Setup-VSTest@3a16d909a1f3bbc65b52f8270d475d905e7d3e44. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/