Fix incorrect links

Author: STREGA

README.md

@@ -10,11 +10,11 @@ There are no "helper" functions or dependences.
 
 ## Available Examples
 General
-1. [User Input](Sources/_01_UserInput/UserInput.swift): 
+1. [User Input](Sources/G_01_UserInput/UserInput.swift): 
 Show text when using certain user inputs.
-2. [Multiple Windows](Sources/_02_MultipleWindows/MultipleWindows.swift): 
+2. [Multiple Windows](Sources/G_02_MultipleWindows/MultipleWindows.swift): 
 Open multiple windows on compatible platforms.
-3. [Save State](Sources/_03_SavingState/SavingState.swift): 
+3. [Save State](Sources/G_03_SavingState/SavingState.swift): 
 Save and restore game state.
 
 2D