RichTextLabel GetContentHeight / Width do not specify units

[BenBlueeeee]

Your Godot version: 4.4.1

Issue description:
RichTextLabel GetContentHeight & Width don't specify any units. It's not obvious whether they are in pixels, line numbers, characters, etc. It would be a lot simpler and more useful if they specified what they are representing.

URL to the documentation page (if already existing):
https://docs.godotengine.org/en/4.4/classes/class_richtextlabel.html#class-richtextlabel-method-get-content-height

[BenBlueeeee]

After testing, I believe they are in pixels, I will try to submit a PR

[Calinou]

They are indeed in pixels, as RichTextLabel can contain non-character data like images or tables.