Update dependency Refit to v8

Author: renovate[bot]

Source/Serilog.Exceptions.Refit/Serilog.Exceptions.Refit.csproj

@@ -15,7 +15,7 @@
   </ItemGroup>
 
   <ItemGroup Label="Package References">
-    <PackageReference Include="Refit" Version="7.2.22" />
+    <PackageReference Include="Refit" Version="8.0.0" />
   </ItemGroup>
 
 </Project>