Description of @abstract is easy to misunderstand

**Your Godot version:**
4.5.1
**Issue description:**
In the description of the `@abstract` annotation it says:

> If a class has at least one abstract method (either its own or an unimplemented inherited one), then it must also be marked as abstract. However, the reverse is not true: an abstract class is allowed to have _no abstract methods_.

I think it should say "non abstract methods" instead, from context the sentence as it is right now makes no sense. I'm not a native speaker but I'm pretty sure the meaning is meant to be that an abstract class is allowed to have functions that are not abstract but the missing n reverses that meaning.

**URL to the documentation page:**
https://docs.godotengine.org/en/4.5/classes/class_@gdscript.html#class-gdscript-annotation-abstract

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