Bump Microsoft.NET.Test.Sdk from 18.8.1 to 18.9.0 - #669

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v2, actions/setup-dotnet@v1, gittools/actions/gitversion/execute@v0, gittools/actions/gitversion/setup@v0.10.2. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Do not use a Where clause to filter before calling Assert.Single. Use the overload of Assert.Single that accepts a filtering function. (https://xunit.net/xunit.analyzers/rules/xUnit2031)

Do not use a Where clause to filter before calling Assert.Single. Use the overload of Assert.Single that accepts a filtering function. (https://xunit.net/xunit.analyzers/rules/xUnit2031)

Do not use a Where clause to filter before calling Assert.Single. Use the overload of Assert.Single that accepts a filtering function. (https://xunit.net/xunit.analyzers/rules/xUnit2031)