fix(grid): [grid] modify the size of the grid component header icon under the saas theme (#3370)

Author: wuyiping0628

packages/theme-saas/src/grid/header.less

@@ -83,7 +83,7 @@
   .@{grid-prefix-cls}-edit-icon {
     @apply mr-1;
     order: -1;
-    @apply text-sm;
+    @apply text-base;
     @apply fill-color-icon-disabled;
     @apply shrink-0;
     + .@{grid-prefix-cls}-cell-text {