Changed a code example that didn't follow the style guide

Author: Hannfeld

tutorials/scripting/gdscript/gdscript_styleguide.rst

@@ -784,7 +784,7 @@ variables, in that order.
 
 ::
 
-    signal spawn_player(position)
+    signal player_spawned(position)
 
     enum Jobs {KNIGHT, WIZARD, ROGUE, HEALER, SHAMAN}