Fix register fact docs (#25)

Author: jonnydgreen

docs/latest/getting-started/register-fact.md

@@ -54,7 +54,7 @@ enum DifficultyLevel {
 }
 
 func evaluate(ctx: ParleyContext, _values: Array) -> int:
-	return ctx.get('difficulty_level', DifficultyLevel.NORMAL)
+	return ctx.p_data.get('difficulty_level', DifficultyLevel.NORMAL)
 
 func available_values() -> Array[DifficultyLevel]:
 	return [

docs/latest/nodes/action-node.md

@@ -36,7 +36,7 @@ Valid action scripts must implement the `ParleyActionInterface` by providing an
 ```gdscript Example Action Script
 func run(ctx: ParleyContext, values: Array) -> int:
 	print("Advancing time by %s" % [values[0]])
-	ctx.get('advance_time').emit(values[0])
+	ctx.p_data.get('advance_time').emit(values[0])
 	return OK
 ```