feat: implement update functionality for receipt aliases and add corresponding tests

flutter/lib/features/admin/data/admin_repository.dart

@@ -420,6 +420,19 @@ class AdminRepository {
         'isGlobal': isGlobal,
       });
 
+  Future<void> updateReceiptAlias(
+    int id, {
+    String? receiptName,
+    int? productId,
+  }) {
+    final body = <String, dynamic>{
+      if (receiptName != null) 'receiptName': receiptName,
+      if (productId != null) 'productId': productId,
+    };
+
+    return _patchVoid(ReceiptAliasApiPaths.update(id), body);
+  }
+
   Future<void> removeReceiptAlias(int id) =>
       _deleteVoid(ReceiptAliasApiPaths.remove(id));