nuget(deps): bump YamlDotNet from 4.3.1 to 5.1.0

Bumps [YamlDotNet](https://github.com/aaubry/YamlDotNet) from 4.3.1 to 5.1.0.
- [Release notes](https://github.com/aaubry/YamlDotNet/releases)
- [Commits](aaubry/YamlDotNet@v4.3.1...v5.1.0)

---
updated-dependencies:
- dependency-name: YamlDotNet
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

src/extensions/Wyam.Yaml/Wyam.Yaml.csproj

@@ -13,6 +13,6 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="YamlDotNet" Version="4.3.1" />
+    <PackageReference Include="YamlDotNet" Version="5.1.0" />
   </ItemGroup>
 </Project>