Bump AutoFixture from 4.14.0 to 4.15.0

Bumps [AutoFixture](https://github.com/AutoFixture/AutoFixture) from 4.14.0 to 4.15.0.
- [Release notes](https://github.com/AutoFixture/AutoFixture/releases)
- [Commits](https://github.com/AutoFixture/AutoFixture/compare/v4.14.0...v4.15.0)

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

tests/Jellyfin.Api.Tests/Jellyfin.Api.Tests.csproj

@@ -13,7 +13,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="AutoFixture" Version="4.14.0" />
+    <PackageReference Include="AutoFixture" Version="4.15.0" />
     <PackageReference Include="AutoFixture.AutoMoq" Version="4.14.0" />
     <PackageReference Include="AutoFixture.Xunit2" Version="4.14.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="5.0.1" />

tests/Jellyfin.Server.Implementations.Tests/Jellyfin.Server.Implementations.Tests.csproj

@@ -14,7 +14,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="AutoFixture" Version="4.14.0" />
+    <PackageReference Include="AutoFixture" Version="4.15.0" />
     <PackageReference Include="AutoFixture.AutoMoq" Version="4.14.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.3" />
     <PackageReference Include="Moq" Version="4.15.2" />