Table: fix background color of complex table when hovering (#15504)

packages/theme-chalk/src/table.scss

@@ -505,7 +505,7 @@
       &, &.el-table__row--striped {
         &, &.current-row {
           > td {
-            background-color: $--table-current-row-background-color;
+            background-color: $--table-row-hover-background-color;
           }
         }
       }