chore(deps): update dependency serilog.extensions.logging to v9

Author: renovate[bot]

Directory.Packages.props

@@ -43,7 +43,7 @@
     <PackageVersion Include="Verify.Xunit" Version="28.0.0" />
     <PackageVersion Include="Verify.SourceGenerators" Version="2.4.3" />
     <PackageVersion Include="NSubstitute" Version="5.3.0" />
-    <PackageVersion Include="Serilog.Extensions.Logging" Version="8.0.0" />
+    <PackageVersion Include="Serilog.Extensions.Logging" Version="9.0.0" />
     <PackageVersion Include="Serilog.Sinks.Observable" Version="3.0.0" />
     <PackageVersion Include="Serilog.Sinks.XUnit" Version="3.0.19" />
     <PackageVersion Include="XunitXml.TestLogger" Version="5.0.0" />