[gantt] Gantt fixes (#6490)

* [gantt] fix Gantt Chart link in Modules

* [gantt] added field for Task dependent
diff --git a/erpnext/config/projects.py b/erpnext/config/projects.py
index e6c9578..87174a4 100644
--- a/erpnext/config/projects.py
+++ b/erpnext/config/projects.py
@@ -19,7 +19,7 @@
 				},
 				{
 					"type": "report",
-					"route": "Gantt/Task",
+					"route": "List/Task/Gantt",
 					"doctype": "Task",
 					"name": "Gantt Chart",
 					"description": _("Gantt chart of all tasks.")