fix: modified date (#16520)

erpnext/projects/doctype/activity_cost/activity_cost.json

@@ -1,5 +1,6 @@
 {
  "allow_copy": 0, 
+ "allow_events_in_timeline": 0, 
  "allow_guest_to_view": 0, 
  "allow_import": 1, 
  "allow_rename": 1, 
@@ -350,7 +351,7 @@
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2018-08-21 16:15:35.363505", 
+ "modified": "2019-01-30 11:28:17.991944", 
  "modified_by": "Administrator", 
  "module": "Projects", 
  "name": "Activity Cost", 

erpnext/projects/doctype/timesheet/timesheet.json

@@ -1000,7 +1000,7 @@
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2018-11-15 07:58:42.629845", 
+ "modified": "2019-01-30 11:28:18.518590", 
  "modified_by": "Administrator", 
  "module": "Projects", 
  "name": "Timesheet",