chore(deps): update dotnet monorepo to 9.0.3 (#423)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Diff for: src/Serilog.Sinks.Http/Serilog.Sinks.Http.csproj

@@ -65,7 +65,7 @@
 
   <ItemGroup>
     <PackageReference Include="Serilog.Sinks.File" Version="6.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="9.0.2" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="9.0.3" />
   </ItemGroup>
 
 </Project>

Diff for: test/Serilog.Sinks.HttpTests/Serilog.Sinks.HttpTests.csproj

@@ -17,7 +17,7 @@
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
     <PackageReference Include="Markdig" Version="0.40.0" />
-    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="9.0.2" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="9.0.3" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
     <PackageReference Include="Serilog.Sinks.File" Version="6.0.0" />
     <PackageReference Include="Serilog.Settings.Configuration" Version="9.0.0" />