Bump NSwag.Core.Yaml from 13.19.0 to 13.20.0 (opensearch-project#336)

* Bump NSwag.Core.Yaml from 13.19.0 to 13.20.0

Bumps [NSwag.Core.Yaml](https://github.com/RicoSuter/NSwag) from 13.19.0 to 13.20.0.
- [Release notes](https://github.com/RicoSuter/NSwag/releases)
- [Changelog](https://github.com/RicoSuter/NSwag/blob/master/CHANGELOG.md)
- [Commits](RicoSuter/NSwag@v13.19.0...v13.20.0)

---
updated-dependencies:
- dependency-name: NSwag.Core.Yaml
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

* Update changelog

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

---------

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

src/ApiGenerator/ApiGenerator.csproj

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
@@ -12,7 +12,7 @@
     <PackageReference Include="CSharpier.Core" Version="0.25.0" />
     <PackageReference Include="Glob" Version="1.1.9" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
-    <PackageReference Include="NSwag.Core.Yaml" Version="13.19.0" />
+    <PackageReference Include="NSwag.Core.Yaml" Version="13.20.0" />
     <PackageReference Include="ShellProgressBar" Version="5.2.0" />
     <PackageReference Include="Spectre.Console" Version="0.47.0" />
     <PackageReference Include="System.CommandLine.DragonFruit" Version="0.3.0-alpha.20371.2" />