nuget: bump System.IdentityModel.Tokens.Jwt from 6.27.0 to 6.28.1 (#4639)

Bumps [System.IdentityModel.Tokens.Jwt](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet) from 6.27.0 to 6.28.1.
- [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/compare/6.27.0...6.28.1)

---
updated-dependencies:
- dependency-name: System.IdentityModel.Tokens.Jwt
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Directory.Packages.props

@@ -44,7 +44,7 @@
     <PackageVersion Include="SixLabors.ImageSharp.Drawing" Version="1.0.0-beta11" />
     <PackageVersion Include="SPB" Version="0.0.4-build28" />
     <PackageVersion Include="System.Drawing.Common" Version="7.0.0" />
-    <PackageVersion Include="System.IdentityModel.Tokens.Jwt" Version="6.27.0" />
+    <PackageVersion Include="System.IdentityModel.Tokens.Jwt" Version="6.28.1" />
     <PackageVersion Include="System.IO.Hashing" Version="7.0.0" />
     <PackageVersion Include="System.Management" Version="7.0.0" />
     <PackageVersion Include="UnicornEngine.Unicorn" Version="2.0.2-rc1-fb78016" />