fix: Fixed hero image field in COurse and Topic
diff --git a/erpnext/education/doctype/course/course.json b/erpnext/education/doctype/course/course.json
index 82032e6..072e8b4 100644
--- a/erpnext/education/doctype/course/course.json
+++ b/erpnext/education/doctype/course/course.json
@@ -320,7 +320,7 @@
    "columns": 0, 
    "fetch_if_empty": 0, 
    "fieldname": "hero_image", 
-   "fieldtype": "Image", 
+   "fieldtype": "Attach Image", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
    "ignore_xss_filter": 0, 
@@ -455,7 +455,7 @@
  "istable": 0, 
  "max_attachments": 0, 
  "menu_index": 0, 
- "modified": "2019-04-01 15:41:47.872949", 
+ "modified": "2019-04-09 11:35:27.354877", 
  "modified_by": "Administrator", 
  "module": "Education", 
  "name": "Course", 
diff --git a/erpnext/education/doctype/topic/topic.json b/erpnext/education/doctype/topic/topic.json
index 94ce240..f47b10d 100644
--- a/erpnext/education/doctype/topic/topic.json
+++ b/erpnext/education/doctype/topic/topic.json
@@ -187,7 +187,7 @@
    "columns": 0, 
    "fetch_if_empty": 0, 
    "fieldname": "hero_image", 
-   "fieldtype": "Image", 
+   "fieldtype": "Attach Image", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
    "ignore_xss_filter": 0, 
@@ -221,7 +221,7 @@
  "istable": 0, 
  "max_attachments": 0, 
  "menu_index": 0, 
- "modified": "2019-04-01 15:42:00.494678", 
+ "modified": "2019-04-09 11:35:34.137040", 
  "modified_by": "Administrator", 
  "module": "Education", 
  "name": "Topic",