fix(input): [input] modify the border issue of the input component under the saas theme

Author: wuyiping0628

packages/theme-saas/src/input/index.less

@@ -46,7 +46,7 @@
 
   &.is-disabled &__inner {
     @apply cursor-not-allowed;
-    @apply border border-solid border-color-border-separator;
+    @apply border border-solid border-color-border;
     @apply text-color-text-disabled;
     @apply bg-color-bg-6;
     .placeholder(@color:theme('colors.color.text.disabled'));