### Godot version

4.0 beta 16 and 17

### System information

Windows 11

### Issue description

Before beta 16 you could write `@export_category(name)` and it would make a category with "name" as the name.
Now you must use a string when defining the category name. (`@export_category("name")`)
The issue is that the moment you type something that doesn't start with `"` the engine crashes.

### Steps to reproduce

1. Create a script.
2. Write one of the following:
a) `@export_category()`
b) `@export_group()`
c) `@export_subgroup()`
3. In the parentheses write *any* character other than `"`.
4. Watch it crash.

If you managed to save the file the project will crash when opened.

### Minimal reproduction project

[Minimal.zip](https://github.com/godotengine/godot/files/10561826/Minimal.zip)

case GDScriptParser::DataType::ENUM: {
				variable->export_info.type = Variant::INT;
				variable->export_info.hint = PROPERTY_HINT_ENUM;
				String enum_hint_string;
				bool first = true;
				for (const KeyValue<StringName, int64_t> &E : export_type.enum_values) {
					if (!first) {
						enum_hint_string += ",";
					} else {
						first = false;
					}
					enum_hint_string += E.key.operator String().capitalize().xml_escape();
					enum_hint_string += ":";
					enum_hint_string += String::num_int64(E.value).xml_escape();
				}
				variable->export_info.hint_string = enum_hint_string;
			} break;
			default:
				
				push_error(R"(Export type can only be built-in, a resource, or an enum.)", variable);
				break;
		}
		if (is_array) {
			String hint_prefix = itos(variable->export_info.type);
			if (variable->export_info.hint) {
				hint_prefix += "/" + itos(variable->export_info.hint);
			}
			variable->export_info.hint = PROPERTY_HINT_TYPE_STRING;
			variable->export_info.hint_string = hint_prefix + ":" + variable->export_info.hint_string;
			variable->export_info.type = Variant::ARRAY;