chore(deps): update dependency system.text.json to v8

Author: renovate[bot]

dotnet/Cucumber.Messages/Cucumber.Messages.csproj

@@ -41,6 +41,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.Text.Json" Version="6.0.9" />
+    <PackageReference Include="System.Text.Json" Version="8.0.4" />
   </ItemGroup>
 </Project>