fix(uikit): simplify hover styles in theme (#641)

* fix(uikit): simplify hover styles in theme

Removed unnecessary nested styles for hover state in the theme, streamlining the CSS for better readability and maintainability.

* Create wild-eggs-act.md

Author: awxxxxxx

.changeset/wild-eggs-act.md

@@ -0,0 +1,5 @@
+---
+"@tidbcloud/uikit": patch
+---
+
+fix(uikit): simplify hover styles in theme

packages/uikit/src/theme/theme.ts

@@ -1418,9 +1418,7 @@ const theme = createTheme({
               color: themeColor(theme, 'carbon', 8)
             },
             '&:hover': {
-              [u.light]: {
-                backgroundColor: themeColor(theme, 'carbon', 2)
-              }
+              backgroundColor: themeColor(theme, 'carbon', 2)
             },
             '&[data-active]': {
               color: themeColor(theme, 'carbon', 9),