test: fix chromatic screenshot diff, cause by storybook root id change

packages/semi-ui/_base/_story/a11y.scss

@@ -1,7 +1,7 @@
 body[data-page="a11y"] {
     overflow: hidden;
 
-    #root {
+    #storybook-root {
         padding: 0 !important;
 
         .semi-slider {