### Godot version

4.1.dev (1becfea37c)

### System information

MacOS 13.3 M1 Pro

### Issue description

When renaming with Batch Rename using invalid character `NodePath` will be updated with the invalid new name.

### Steps to reproduce

1.  open MRP
2. batch rename all nodes except the root from `e` to `%`
3. look at the `NodePath` on the root

### Minimal reproduction project

[test1.zip](https://github.com/godotengine/godot/files/11377324/test1.zip)

but_insert_root = memnew(Button);
	but_insert_root->set_text("ROOT");
	but_insert_root->set_tooltip_text(String("${ROOT}\n") + TTR("Root node name."));
	but_insert_root->set_focus_mode(Control::FOCUS_NONE);
	but_insert_root->connect("pressed", callable_mp(this, &RenameDialog::_insert_text).bind("${ROOT}"));
	but_insert_root->set_h_size_flags(Control::SIZE_EXPAND_FILL);
	grd_substitute->add_child(but_insert_root);
	
	but_insert_count = memnew(Button);
	but_insert_count->set_text("COUNTER");
	but_insert_count->set_tooltip_text(String("${COUNTER}\n") + TTR("Sequential integer counter.\nCompare counter options."));
	but_insert_count->set_focus_mode(Control::FOCUS_NONE);
	but_insert_count->connect("pressed", callable_mp(this, &RenameDialog::_insert_text).bind("${COUNTER}"));
	but_insert_count->set_h_size_flags(Control::SIZE_EXPAND_FILL);
	grd_substitute->add_child(but_insert_count);
	chk_per_level_counter = memnew(CheckBox);
	chk_per_level_counter->set_text(TTR("Per-level Counter"));
	chk_per_level_counter->set_tooltip_text(TTR("If set, the counter restarts for each group of child nodes."));
	vbc_substitute->add_child(chk_per_level_counter);
	HBoxContainer *hbc_count_options = memnew(HBoxContainer);
	vbc_substitute->add_child(hbc_count_options);
	Label *lbl_count_start = memnew(Label);
	lbl_count_start->set_text(TTR("Start"));
	lbl_count_start->set_tooltip_text(TTR("Initial value for the counter."));
	hbc_count_options->add_child(lbl_count_start);
	spn_count_start = memnew(SpinBox);
	spn_count_start->set_tooltip_text(TTR("Initial value for the counter."));
	spn_count_start->set_step(1);
	spn_count_start->set_min(0);
	hbc_count_options->add_child(spn_count_start);