Bump FluentValidation.AspNetCore and FluentValidation

Bumps [FluentValidation.AspNetCore](https://github.com/FluentValidation/FluentValidation.AspNetCore) and [FluentValidation](https://github.com/JeremySkinner/fluentvalidation). These dependencies needed to be updated together.

Updates `FluentValidation.AspNetCore` from 10.3.4 to 11.3.0
- [Release notes](https://github.com/FluentValidation/FluentValidation.AspNetCore/releases)
- [Commits](https://github.com/FluentValidation/FluentValidation.AspNetCore/commits/11.3.0)

Updates `FluentValidation` from 10.3.4 to 11.5.1
- [Release notes](https://github.com/JeremySkinner/fluentvalidation/releases)
- [Changelog](https://github.com/FluentValidation/FluentValidation/blob/main/Changelog.txt)
- [Commits](FluentValidation/FluentValidation@10.3.4...11.5.1)

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

@@ -22,7 +22,7 @@
     </ItemGroup>
 
     <ItemGroup>
-      <PackageReference Include="FluentValidation.AspNetCore" Version="10.3.4" />
+      <PackageReference Include="FluentValidation.AspNetCore" Version="11.3.0" />
       <PackageReference Include="IdentityModel" Version="4.3.0" />
       <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="5.0.0" />
       <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="8.0.0" />