docs: update docs icons (#12465)

### What problem does this PR solve?

Update icons for docs.
Trailing spaces are auto truncated by the editor, does not affect real
content.

### Type of change

- [x] Documentation Update

docs/guides/dataset/enable_excel2html.md

@@ -1,6 +1,9 @@
 ---
 sidebar_position: 4
 slug: /enable_excel2html
+sidebar_custom_props: {
+  categoryIcon: LucideToggleRight
+}
 ---
 
 # Enable Excel2HTML