Fix check in `Object._ValidateProperty` example

The GDScript version above makes the `number` property read only whenever
`is_number_editable` is false.

```gdscript
func _validate_property(property: Dictionary):
	if property.name == "number" and not is_number_editable:
		property.usage |= PROPERTY_USAGE_READ_ONLY
```

The C# version is similar, but omits the negation, so the Number property is
made read only whenever `is_number_editable` is true.

This adds the negation to the C# example, making it match the GDScript
example.

0 files changed, 0 insertions, 0 deletions