Bump MimeKit from 4.13.0 to 4.15.1

---
updated-dependencies:
- dependency-name: MimeKit
  dependency-version: 4.15.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

src/runner/Synapse.Runner/Synapse.Runner.csproj

@@ -59,7 +59,7 @@
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.8" />
 	<PackageReference Include="Microsoft.OpenApi.Readers" Version="1.6.24" />
 	<PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.22.1" />
-	<PackageReference Include="MimeKit" Version="4.13.0" />
+	<PackageReference Include="MimeKit" Version="4.15.1" />
 	<PackageReference Include="Moq" Version="4.20.72" />
 	<PackageReference Include="Neuroglia.AsyncApi.Client.Bindings.All" Version="3.0.6" />
 	<PackageReference Include="Neuroglia.AsyncApi.DependencyInjectionExtensions" Version="3.0.6" />