chore(deps): bump Microsoft.IdentityModel.Tokens from 6.17.0 to 6.21.0 (

#84)

Bumps [Microsoft.IdentityModel.Tokens](https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet) from 6.17.0 to 6.21.0.
- [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](AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet@6.17.0...6.21.0)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Adam Letizia <43392371+koalaty-code@users.noreply.github.com>

AzureKeyVaultEmulator.AcceptanceTests/AzureKeyVaultEmulator.AcceptanceTests.csproj

@@ -9,7 +9,7 @@
     <ItemGroup>
         <PackageReference Include="Azure.Security.KeyVault.Keys" Version="4.3.0" />
         <PackageReference Include="Azure.Security.KeyVault.Secrets" Version="4.3.0" />
-        <PackageReference Include="Microsoft.IdentityModel.Tokens" Version="6.17.0" />
+        <PackageReference Include="Microsoft.IdentityModel.Tokens" Version="6.21.0" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.2.0" />
         <PackageReference Include="xunit" Version="2.4.1" />
         <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">