Bump System.IdentityModel.Tokens.Jwt from 4.0.4.403061554 to 5.7.0 in /002-IntroToAzureAI/Student/Resources/Challenge-2.3-Logging-Chat-Conversations/code/core-Middleware (#861)

Bump System.IdentityModel.Tokens.Jwt

Bumps [System.IdentityModel.Tokens.Jwt](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet) from 4.0.4.403061554 to 5.7.0.
- [Release notes](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/releases)
- [Changelog](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/blob/dev/CHANGELOG.md)
- [Commits](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/commits/5.7.0)

---
updated-dependencies:
- dependency-name: System.IdentityModel.Tokens.Jwt
  dependency-type: direct:production
...

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002-IntroToAzureAI/Student/Resources/Challenge-2.3-Logging-Chat-Conversations/code/core-Middleware/packages.config

@@ -6,7 +6,7 @@
   <package id="Microsoft.AspNet.WebApi.Client" version="5.2.3" targetFramework="net46" />
   <package id="Microsoft.AspNet.WebApi.Core" version="5.2.3" targetFramework="net46" />
   <package id="Microsoft.AspNet.WebApi.WebHost" version="5.2.3" targetFramework="net46" />
-  <package id="Microsoft.Bot.Builder" version="3.8.0.0" targetFramework="net46" />
+  <package id="Microsoft.Bot.Builder" version="3.8.0" targetFramework="net46" />
   <package id="Microsoft.IdentityModel.Protocol.Extensions" version="1.0.4.403061554" targetFramework="net46" />
   <package id="Microsoft.Rest.ClientRuntime" version="2.3.24" targetFramework="net46" />
   <package id="Microsoft.WindowsAzure.ConfigurationManager" version="3.2.3" targetFramework="net46" />