fix: fixed the issue of users unable to save sketches

Inserting new sketches is failing because the web user role doesn't have
permission to create sketches. Fixed it by adding
ignore_permission=True.

community/lms/doctype/lms_sketch/lms_sketch.py

@@ -77,7 +77,7 @@ def save_sketch(name, title, code):
         doc.title = title
         doc.code = code
         doc.runtime = 'python-canvas'
-        doc.insert()
+        doc.insert(ignore_permissions=True)
         status = "created"
     else:
         doc = frappe.get_doc("LMS Sketch", name)