Bump Microsoft.NET.Test.Sdk from 17.12.0 to 18.8.1 - #85

Process completed with exit code 1.

Parameter 'value' must have a non-null value when exiting with 'true'.

The type 'DockerSqliteBackup.Utilities.FileSystemUtilityJsonExtensions.FileSystemUtilityConfig' has been annotated with JsonSerializableAttribute but does not derive from JsonSerializerContext. No source code will be generated. (https://learn.microsoft.com/dotnet/fundamentals/syslib-diagnostics/syslib1224)

Parameter 'value' must have a non-null value when exiting with 'true'.

The type 'DockerSqliteBackup.Utilities.FileSystemUtilityJsonExtensions.FileSystemUtilityConfig' has been annotated with JsonSerializableAttribute but does not derive from JsonSerializerContext. No source code will be generated. (https://learn.microsoft.com/dotnet/fundamentals/syslib-diagnostics/syslib1224)

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-dotnet@v4, actions/upload-artifact@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/