fix: Modify opts parameter misspell (#31476)

Modify opts parameter misspell 

closes #31474
diff --git a/erpnext/buying/doctype/purchase_order/purchase_order.js b/erpnext/buying/doctype/purchase_order/purchase_order.js
index da45610..33dbe3f 100644
--- a/erpnext/buying/doctype/purchase_order/purchase_order.js
+++ b/erpnext/buying/doctype/purchase_order/purchase_order.js
@@ -425,7 +425,7 @@
 						company: me.frm.doc.company
 					},
 					allow_child_item_selection: true,
-					child_fielname: "items",
+					child_fieldname: "items",
 					child_columns: ["item_code", "qty"]
 				})
 			}, __("Get Items From"));
diff --git a/erpnext/public/js/utils.js b/erpnext/public/js/utils.js
index 01710f1..096175a 100755
--- a/erpnext/public/js/utils.js
+++ b/erpnext/public/js/utils.js
@@ -713,7 +713,7 @@
 			get_query: opts.get_query,
 			add_filters_group: 1,
 			allow_child_item_selection: opts.allow_child_item_selection,
-			child_fieldname: opts.child_fielname,
+			child_fieldname: opts.child_fieldname,
 			child_columns: opts.child_columns,
 			size: opts.size,
 			action: function(selections, args) {