chore(deps): update dependency serilog.aspnetcore to v9

Author: renovate[bot]

Rnwood.Smtp4dev/Rnwood.Smtp4dev.csproj

@@ -55,7 +55,7 @@
 
 
     <PackageReference Include="Serilog" Version="4.2.0" />
-    <PackageReference Include="Serilog.AspNetCore" Version="8.0.3" />
+    <PackageReference Include="Serilog.AspNetCore" Version="9.0.0" />
     <PackageReference Include="Serilog.Settings.Configuration" Version="9.0.0" />
     <PackageReference Include="Serilog.Sinks.Console" Version="6.0.0" />
     <PackageReference Include="Serilog.Sinks.EventLog" Version="4.0.0" />