add devNote about etecoon shaft in-room tricky dash jump

Author: blkerby

region/brinstar/green/Green Brinstar Main Shaft.json

@@ -4739,7 +4739,10 @@
         "canMomentumConservingMorph",
         "canTrickySpringBallJump"
       ],
-      "wallJumpAvoid": true
+      "wallJumpAvoid": true,
+      "devNote": [
+        "This strat is not very useful, since the in-room tricky dash jump into spring ball jump is easier."
+      ]
     },
     {
       "id": 217,