chore(ui): darken the background color of img's mask

Author: xiejay97

packages/ui/src/styles/_root.scss

@@ -47,7 +47,7 @@
   --#{$rd-prefix}background-color-input: rgb(255 255 255);
   --#{$rd-prefix}background-color-disabled: rgb(247 247 247);
   --#{$rd-prefix}background-color-hover: rgb(0 0 0 / 4%);
-  --#{$rd-prefix}background-color-light-hover: rgb(255 255 255 / 16%);
+  --#{$rd-prefix}background-color-light-hover: rgb(255 255 255 / 38%);
   --#{$rd-prefix}background-color-indicator: #dfe1e6;
   --#{$rd-prefix}background-color-actions-mask: rgb(0 0 0 / 20%);
   --#{$rd-prefix}color-divider: rgb(239 239 239);