Update dependency Serilog.Sinks.Async to v2

Author: renovate[bot]

Directory.Packages.props

@@ -34,7 +34,7 @@
     <PackageVersion Include="SemanticVersioning" Version="2.0.2" />
     <PackageVersion Include="Serilog" Version="4.0.0" />
     <PackageVersion Include="Serilog.Extensions.Logging" Version="8.0.0" />
-    <PackageVersion Include="Serilog.Sinks.Async" Version="1.5.0" />
+    <PackageVersion Include="Serilog.Sinks.Async" Version="2.0.0" />
     <PackageVersion Include="Serilog.Sinks.Console" Version="5.0.1" />
     <PackageVersion Include="Serilog.Sinks.File" Version="5.0.0" />
     <PackageVersion Include="Serilog.Sinks.Map" Version="1.0.2" />