Bump IdentityModel from 4.3.0 to 6.2.0

Bumps [IdentityModel](https://github.com/IdentityModel/IdentityModel) from 4.3.0 to 6.2.0.
- [Release notes](https://github.com/IdentityModel/IdentityModel/releases)
- [Commits](DuendeArchive/IdentityModel@4.3.0...6.2.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

OpenAPI/LearningHub.Nhs.OpenApi.Services/LearningHub.Nhs.OpenApi.Services.csproj

@@ -23,7 +23,7 @@
 
     <ItemGroup>
       <PackageReference Include="FluentValidation.AspNetCore" Version="11.3.0" />
-      <PackageReference Include="IdentityModel" Version="4.3.0" />
+      <PackageReference Include="IdentityModel" Version="6.2.0" />
       <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="5.0.0" />
       <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="8.0.0" />
       <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />