[fix] uppercase filter frappe/erpnext#8996 (#9026)

diff --git a/erpnext/accounts/page/pos/pos.js b/erpnext/accounts/page/pos/pos.js
index 9261fa4..223e915 100644
--- a/erpnext/accounts/page/pos/pos.js
+++ b/erpnext/accounts/page/pos/pos.js
@@ -709,7 +709,7 @@
 				filter: function (item, input) {
 					var value = item.value.toLowerCase();
 					if (value.indexOf('is_action') !== -1 ||
-						value.indexOf(input) !== -1) {
+						value.indexOf(input.toLowerCase()) !== -1) {
 						return true;
 					}
 				},