Bump NSwag.AspNetCore from 13.7.1 to 13.7.4

Bumps [NSwag.AspNetCore](https://github.com/RicoSuter/NSwag) from 13.7.1 to 13.7.4.
- [Release notes](https://github.com/RicoSuter/NSwag/releases)
- [Changelog](https://github.com/RicoSuter/NSwag/blob/master/CHANGELOG.md)
- [Commits](https://github.com/RicoSuter/NSwag/commits)
Signed-off-by: Ndependabot-preview[bot] <support@dependabot.com>

IoTSharp/IoTSharp.csproj

@@ -71,7 +71,7 @@
     <PackageReference Include="MQTTnet.Extensions.Rpc" Version="3.0.12" />
     <PackageReference Include="NetMQ" Version="4.0.1.5" />
     <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="3.1.4" />
-    <PackageReference Include="NSwag.AspNetCore" Version="13.7.1" />
+    <PackageReference Include="NSwag.AspNetCore" Version="13.7.4" />
     <PackageReference Include="OptimizedPriorityQueue" Version="5.0.0" />
     <PackageReference Include="ProxyKit" Version="2.3.3" />
     <PackageReference Include="Savorboard.CAP.InMemoryMessageQueue" Version="3.0.0" />