Bump Microsoft.Extensions.Configuration and Microsoft.Extensions.Configuration.Json

Bumps [Microsoft.Extensions.Configuration](https://github.com/dotnet/runtime) and [Microsoft.Extensions.Configuration.Json](https://github.com/dotnet/runtime). These dependencies needed to be updated together.

Updates `Microsoft.Extensions.Configuration` from 8.0.0 to 9.0.0
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v8.0.0...v9.0.0)

Updates `Microsoft.Extensions.Configuration.Json` from 8.0.1 to 9.0.0
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v8.0.1...v9.0.0)

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.Configuration
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: Microsoft.Extensions.Configuration.Json
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

test/Modrinth.Net.Test/Modrinth.Net.Test.csproj

@@ -11,8 +11,8 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.Extensions.Configuration" Version="8.0.0"/>
-        <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="8.0.1"/>
+        <PackageReference Include="Microsoft.Extensions.Configuration" Version="9.0.0"/>
+        <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="9.0.0"/>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1"/>
         <PackageReference Include="Moq" Version="4.20.72" />
         <PackageReference Include="NUnit" Version="4.2.2"/>