Update region/brinstar/green/Etecoon Energy Tank Room.json

Co-authored-by: kjbranch <61815121+kjbranch@users.noreply.github.com>

Author: nn357

region/brinstar/green/Etecoon Energy Tank Room.json

@@ -1201,7 +1201,7 @@
       ],
       "exitCondition": {
         "leaveWithRunway": {
-          "length": 10,
+          "length": 9,
           "openEnd": 0
         }
       },