Horizontal Alignment tag on "BBCode in RichTextLabel"

[Zain-A-Abbas]

Your Godot version:
4.1
Issue description:
The BBCode in RichTextLabel page has incorrect description text for the [left] tag.

URL to the documentation page:
https://docs.godotengine.org/en/stable/tutorials/ui/bbcode_in_richtextlabel.html