Rename order in examples

Author: zhujinxuan

examples/demo/src/invoices/InvoiceList.tsx

@@ -23,7 +23,7 @@ const InvoiceList = () => {
         <List
             filters={listFilters}
             perPage={25}
-            sort={{ field: 'date', order: 'desc' }}
+            sort={{ field: 'date', order: 'DESC' }}
         >
             <Datagrid
                 rowClick="expand"

packages/ra-data-simple-rest/src/index.spec.ts

@@ -20,7 +20,7 @@ describe('Data Simple REST Client', () => {
                 },
                 sort: {
                     field: 'title',
-                    order: 'desc',
+                    order: 'DESC',
                 },
             });
 
@@ -61,7 +61,7 @@ describe('Data Simple REST Client', () => {
                 },
                 sort: {
                     field: 'title',
-                    order: 'desc',
+                    order: 'DESC',
                 },
             });