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/agent/agent_component_reference/text_processing.mdx

@@ -1,6 +1,9 @@
 ---
 sidebar_position: 15
 slug: /text_processing
+sidebar_custom_props: {
+  categoryIcon: LucideType
+}
 ---
 
 # Text processing component
@@ -24,7 +27,7 @@ Appears only when you select **Split** as method.
 
 The variable to be split. Type `/` to quickly insert variables.
 
-### Script 
+### Script
 
 Template for the merge. Appears only when you select **Merge** as method. Type `/` to quickly insert variables.