Fixed: Ignore case for name validation in providers

(cherry picked from commit 0edc5ba99a15c5f80305b387a053f35fc3f6e51b)

src/Prowlarr.Api.V1/ProviderControllerBase.cs

@@ -3,6 +3,7 @@ using System.Linq;
 using FluentValidation;
 using FluentValidation.Results;
 using Microsoft.AspNetCore.Mvc;
+using NzbDrone.Common.Extensions;
 using NzbDrone.Core.ThingiProvider;
 using NzbDrone.Core.Validation;
 using NzbDrone.Http.REST.Attributes;
@@ -31,7 +32,7 @@ namespace Prowlarr.Api.V1
             _bulkResourceMapper = bulkResourceMapper;
 
             SharedValidator.RuleFor(c => c.Name).NotEmpty();
-            SharedValidator.RuleFor(c => c.Name).Must((v, c) => !_providerFactory.All().Any(p => p.Name == c && p.Id != v.Id)).WithMessage("Should be unique");
+            SharedValidator.RuleFor(c => c.Name).Must((v, c) => !_providerFactory.All().Any(p => p.Name.EqualsIgnoreCase(c) && p.Id != v.Id)).WithMessage("Should be unique");
             SharedValidator.RuleFor(c => c.Implementation).NotEmpty();
             SharedValidator.RuleFor(c => c.ConfigContract).NotEmpty();