fix: report chart field type

* fix: report chart field type

Co-authored-by: Sagar Sharma <sagarsharma.s312@gmail.com>
Co-authored-by: Deepesh Garg <deepeshgarg6@gmail.com>
(cherry picked from commit f41d1500b0)

erpnext/buying/report/purchase_order_trends/purchase_order_trends.py

@@ -53,4 +53,5 @@ def get_chart_data(data, conditions, filters):
 		},
 		"type": "line",
 		"lineOptions": {"regionFill": 1},
+		"fieldtype": "Currency",
 	}

erpnext/stock/report/delivery_note_trends/delivery_note_trends.py

@@ -45,4 +45,5 @@ def get_chart_data(data, filters):
 			"datasets": [{"name": _("Total Delivered Amount"), "values": datapoints}],
 		},
 		"type": "bar",
+		"fieldtype": "Currency",
 	}

erpnext/stock/report/purchase_receipt_trends/purchase_receipt_trends.py

@@ -46,4 +46,5 @@ def get_chart_data(data, filters):
 		},
 		"type": "bar",
 		"colors": ["#5e64ff"],
+		"fieldtype": "Currency",
 	}