feat: enable track changes for leave type (#26917) (#26959)

Co-authored-by: Jannat Patel <31363128+pateljannat@users.noreply.github.com>
(cherry picked from commit a9a24051c9)

Co-authored-by: Anupam Kumar <anupamvns0099@gmail.com>

erpnext/hr/doctype/leave_type/leave_type.json

@@ -214,7 +214,7 @@
  "icon": "fa fa-flag",
  "idx": 1,
  "links": [],
- "modified": "2021-03-02 11:22:33.776320",
+ "modified": "2021-08-12 16:10:36.464690",
  "modified_by": "Administrator",
  "module": "HR",
  "name": "Leave Type",
@@ -248,5 +248,6 @@
   }
  ],
  "sort_field": "modified",
- "sort_order": "DESC"
+ "sort_order": "DESC",
+ "track_changes": 1
 }