Bump Microsoft.Extensions.DependencyInjection.Abstractions and Testcontainers

Bumps [Microsoft.Extensions.DependencyInjection.Abstractions](https://github.com/dotnet/runtime) and [Testcontainers](https://github.com/testcontainers/testcontainers-dotnet). These dependencies needed to be updated together.

Updates `Microsoft.Extensions.DependencyInjection.Abstractions` from 9.0.1 to 8.0.2
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v9.0.1...v8.0.2)

Updates `Testcontainers` from 4.1.0 to 4.2.0
- [Release notes](https://github.com/testcontainers/testcontainers-dotnet/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-dotnet/blob/develop/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-dotnet@4.1.0...4.2.0)

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.DependencyInjection.Abstractions
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: Testcontainers
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

test/FluentRest.Tests/FluentRest.Tests.csproj

@@ -17,7 +17,7 @@
     <PackageReference Include="Microsoft.Extensions.Http" Version="9.0.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageReference Include="System.Text.Json" Version="9.0.1" />
-    <PackageReference Include="Testcontainers" Version="4.1.0" />
+    <PackageReference Include="Testcontainers" Version="4.2.0" />
     <PackageReference Include="XUnit.Hosting" Version="2.0.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.0.1">
       <PrivateAssets>all</PrivateAssets>