Fix highlighted line

Author: eerhardt

docs/core/extensions/configuration-generator.md

@@ -40,7 +40,7 @@ The preceding project file enables the configuration source generator by setting
 
 Next, consider the _Program.cs_ file:
 
-:::code source="snippets/configuration/console-binder-gen/Program.cs" highlight="12-14":::
+:::code source="snippets/configuration/console-binder-gen/Program.cs" highlight="13":::
 
 The preceding code: