fix: samples/JwtSample/JwtSample.csproj to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DOTNET-SYSTEMTEXTENCODINGSWEB-1253267
- https://snyk.io/vuln/SNYK-DOTNET-NEWTONSOFTJSON-2774678
- https://snyk.io/vuln/SNYK-DOTNET-SYSTEMNETHTTP-60045
- https://snyk.io/vuln/SNYK-DOTNET-SYSTEMNETHTTP-60046
- https://snyk.io/vuln/SNYK-DOTNET-SYSTEMNETHTTP-72439
- https://snyk.io/vuln/SNYK-DOTNET-SYSTEMTEXTREGULAREXPRESSIONS-174708
- https://snyk.io/vuln/SNYK-DOTNET-SYSTEMNETHTTP-60047
- https://snyk.io/vuln/SNYK-DOTNET-SYSTEMSECURITYCRYPTOGRAPHYXML-2977914
- https://snyk.io/vuln/SNYK-DOTNET-SYSTEMNETHTTP-60048

Author: snyk-bot

samples/JwtSample/JwtSample.csproj

@@ -26,7 +26,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Versioning.ApiExplorer" Version="4.1.1" />
     <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.10.9" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="5.0.0" />
-    <PackageReference Include="AspNetCore.MarkdownDocumenting" Version="2.0.0" />
+    <PackageReference Include="AspNetCore.MarkdownDocumenting" Version="2.1.0" />
     <PackageReference Include="Microsoft.Extensions.ApiDescription.Client" Version="3.1.2">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>