Update dependency Serilog.Extensions.Logging to v8

Author: renovate[bot]

Directory.Packages.props

@@ -43,7 +43,7 @@
     <PackageVersion Include="Verify.Xunit" Version="22.3.0" />
     <PackageVersion Include="Verify.SourceGenerators" Version="2.2.0" />
     <PackageVersion Include="NSubstitute" Version="5.1.0" />
-    <PackageVersion Include="Serilog.Extensions.Logging" Version="7.0.0" />
+    <PackageVersion Include="Serilog.Extensions.Logging" Version="8.0.0" />
     <PackageVersion Include="Serilog.Sinks.Observable" Version="2.0.2" />
     <PackageVersion Include="Serilog.Sinks.XUnit" Version="3.0.5" />
     <PackageVersion Include="XunitXml.TestLogger" Version="3.1.17" />