Document landmark setting and item balls

data/maps/ScorchedSlab/map.json

@@ -24,7 +24,7 @@
       "movement_range_y": 0,
       "trainer_type": "0",
       "trainer_sight_or_berry_tree_id": "0",
-      "script": "ScorchedSlab_EventScript_2912AF",
+      "script": "ScorchedSlab_EventScript_ItemTM11",
       "flag": "FLAG_ITEM_SCORCHED_SLAB_TM_11"
     }
   ],

data/maps/ScorchedSlab/scripts.inc

@@ -1,8 +1,8 @@
 ScorchedSlab_MapScripts:: @ 8239291
-	map_script MAP_SCRIPT_ON_TRANSITION, ScorchedSlab_MapScript1_239297
+	map_script MAP_SCRIPT_ON_TRANSITION, ScorchedSlab_MapScript1_SetLandmark
 	.byte 0
 
-ScorchedSlab_MapScript1_239297: @ 8239297
+ScorchedSlab_MapScript1_SetLandmark: @ 8239297
 	setflag FLAG_LANDMARK_SCORCHED_SLAB
 	end