Update changed default value in documentation

Author: cesarBLG

Source/Documentation/Manual/options.rst

@@ -413,7 +413,7 @@ At game start, Electric - power connected
 When this option is checked, stationary electric locos start the simulation with power available.
 Uncheck this option for a more detailed behaviour in which the player has to switch on electrical equipment.
 
-The default setting is unchecked.
+The default setting is checked.
 
 
 .. _options-forced-red: