LibJS: Rename BoundFunction::m_target_function to match spec name

Author: https://github.com/linusg
Commit: 4566472ed6
Pull-request: https://github.com/SerenityOS/serenity/pull/10203
Reviewed-by: https://github.com/IdanHo ✅
Reviewed-by: https://github.com/davidot

Userland/Libraries/LibJS/Runtime/AbstractOperations.cpp

@@ -150,7 +150,7 @@ ThrowCompletionOr<Realm*> get_function_realm(GlobalObject& global_object, Functi
         auto& bound_function = static_cast<BoundFunction const&>(function);
 
         // a. Let target be obj.[[BoundTargetFunction]].
-        auto& target = bound_function.target_function();
+        auto& target = bound_function.bound_target_function();
 
         // b. Return ? GetFunctionRealm(target).
         return get_function_realm(global_object, target);