Bump Microsoft.Extensions.Configuration.Json from 7.0.0 to 8.0.0 (#135)

Bumps [Microsoft.Extensions.Configuration.Json](https://github.com/dotnet/runtime) from 7.0.0 to 8.0.0.
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v7.0.0...v8.0.0)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/Autodesk.Forge.Core/Autodesk.Forge.Core.csproj

@@ -24,7 +24,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="8.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="7.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Http" Version="7.0.0" />
     <PackageReference Include="Microsoft.Extensions.Options" Version="8.0.0" />