add FIXME about water entry

Author: blkerby

region/maridia/inner-pink/Crab Shaft.json

@@ -2031,7 +2031,8 @@
       ],
       "farmCycleDrops": [
         {"enemy": "Sciser", "count": 1}
-      ]
+      ],
+      "devNote": "FIXME: for the Grapple case, a water entry above can work as an alternative to wall jump or unmorph."
     },
     {
       "id": 59,