fix(spindle-ui): storybookのButtonGroup横並びストーリーのボタン順序を修正

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: MasatoHonda

packages/spindle-ui/src/ButtonGroup/ButtonGroup.stories.tsx

@@ -15,12 +15,12 @@ export const RowDirectionWithLargeButtons: Story = {
   render: () => (
     <>
       <ButtonGroup direction="row" size="large">
-        <Button size="large" variant="contained">
-          新規登録
-        </Button>
         <Button size="large" variant="outlined">
           ログイン
         </Button>
+        <Button size="large" variant="contained">
+          新規登録
+        </Button>
       </ButtonGroup>
     </>
   ),
@@ -41,12 +41,12 @@ export const RowDirectionWithMediumButtons: Story = {
   render: () => (
     <>
       <ButtonGroup direction="row" size="medium">
-        <Button size="medium" variant="contained">
-          新規登録
-        </Button>
         <Button size="medium" variant="outlined">
           ログイン
         </Button>
+        <Button size="medium" variant="contained">
+          新規登録
+        </Button>
       </ButtonGroup>
     </>
   ),
@@ -71,12 +71,12 @@ export const RowDirectionWithSmallButtons: Story = {
   render: () => (
     <>
       <ButtonGroup direction="row" size="small">
-        <Button size="small" variant="contained">
-          新規登録
-        </Button>
         <Button size="small" variant="outlined">
           ログイン
         </Button>
+        <Button size="small" variant="contained">
+          新規登録
+        </Button>
       </ButtonGroup>
     </>
   ),