Bump FSharp.Core and Thoth.Json.Net (#306)

Bumps [FSharp.Core](https://github.com/dotnet/fsharp) and [Thoth.Json.Net](https://github.com/thoth-org/Thoth.Json.Net). These dependencies needed to be updated together.

Updates `FSharp.Core` from 8.0.401 to 4.7.2
- [Release notes](https://github.com/dotnet/fsharp/releases)
- [Changelog](https://github.com/dotnet/fsharp/blob/main/release-notes.md)
- [Commits](https://github.com/dotnet/fsharp/commits)

Updates `Thoth.Json.Net` from 11.0.0 to 12.0.0
- [Release notes](https://github.com/thoth-org/Thoth.Json.Net/releases)
- [Changelog](https://github.com/thoth-org/Thoth.Json.Net/blob/main/CHANGELOG.md)
- [Commits](thoth-org/Thoth.Json.Net@11.0.0...12.0.0)

---
updated-dependencies:
- dependency-name: FSharp.Core
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: Thoth.Json.Net
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Directory.Packages.props

@@ -36,7 +36,7 @@
     <PackageVersion Include="Amazon.Lambda.Serialization.SystemTextJson" Version="2.4.3" />
     <PackageVersion Include="Amazon.Lambda.APIGatewayEvents" Version="2.7.0" />
     <PackageVersion Include="Microsoft.Net.Http.Headers" Version="8.0.7" />
-    <PackageVersion Include="Thoth.Json.Net" Version="11.0.0" />
+    <PackageVersion Include="Thoth.Json.Net" Version="12.0.0" />
     <PackageVersion Include="Suave" Version="2.6.2" Condition="'$(Configuration)' == 'Debug'" />
     <!-- Analyzers -->
     <PackageVersion Include="FSharp.Analyzers.Build" Version="0.3.0" />