test: Fix used frappe._dict to avoid AttributeError down the line

ref: https://github.com/frappe/erpnext/runs/5816574721?check_suite_focus=true#step:12:880
diff --git a/erpnext/quality_management/doctype/quality_procedure/test_quality_procedure.py b/erpnext/quality_management/doctype/quality_procedure/test_quality_procedure.py
index daf7a69..a26ce23 100644
--- a/erpnext/quality_management/doctype/quality_procedure/test_quality_procedure.py
+++ b/erpnext/quality_management/doctype/quality_procedure/test_quality_procedure.py
@@ -19,7 +19,7 @@
 				)
 			).insert()
 
-			frappe.form_dict = dict(
+			frappe.form_dict = frappe._dict(
 				doctype="Quality Procedure",
 				quality_procedure_name="Test Child 1",
 				parent_quality_procedure=procedure.name,