doc: Clarify need to save ConfigFile to apply changes to file
doc: Clarify need to save ConfigFile to apply changes to file

See #52645 for context.

(cherry picked from commit fd8bdddd5d42dcffbc1a3d6a08f0ff6d0636f5a8)

ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot